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Finding the Fourth Proportional to 127,855,873.80, 191,808,693.90 and 55,072,513.80

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Solution

The fourth proportional to 127,855,873.80, 191,808,693.90 and 55,072,513.80 is: 82,619,488.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,855,873.80 : 191,808,693.90 = 55,072,513.80 : x
  2. Step 2: Convert to fraction form
    127,855,873.80/191,808,693.90 = 55,072,513.80/x
  3. Step 3: Cross multiply
    127,855,873.80x = 191,808,693.90 × 55,072,513.80
  4. Step 4: Simplify right side
    127,855,873.80x = 10,563,386,941,767,726
  5. Step 5: Solve for x
    x = 10,563,386,941,767,726/127,855,873.80
  6. Step 6: Final answer
    x = 82,619,488.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.