Home / 128,857,312,983.59-177,828,603,332.05-71,764,614,325.20

Finding the Fourth Proportional to 128,857,312,983.59, 177,828,603,332.05 and 71,764,614,325.20

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Solution

The fourth proportional to 128,857,312,983.59, 177,828,603,332.05 and 71,764,614,325.20 is: 99,038,237,245.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857,312,983.59 : 177,828,603,332.05 = 71,764,614,325.20 : x
  2. Step 2: Convert to fraction form
    128,857,312,983.59/177,828,603,332.05 = 71,764,614,325.20/x
  3. Step 3: Cross multiply
    128,857,312,983.59x = 177,828,603,332.05 × 71,764,614,325.20
  4. Step 4: Simplify right side
    128,857,312,983.59x = 12,761,801,134,114,076,622,848
  5. Step 5: Solve for x
    x = 12,761,801,134,114,076,622,848/128,857,312,983.59
  6. Step 6: Final answer
    x = 99,038,237,245.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.