Home / 85,931,983.41-128,896,712.92-21,235,786.93

Finding the Fourth Proportional to 85,931,983.41, 128,896,712.92 and 21,235,786.93

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Solution

The fourth proportional to 85,931,983.41, 128,896,712.92 and 21,235,786.93 is: 31,853,368.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931,983.41 : 128,896,712.92 = 21,235,786.93 : x
  2. Step 2: Convert to fraction form
    85,931,983.41/128,896,712.92 = 21,235,786.93/x
  3. Step 3: Cross multiply
    85,931,983.41x = 128,896,712.92 × 21,235,786.93
  4. Step 4: Simplify right side
    85,931,983.41x = 2,737,223,131,546,498
  5. Step 5: Solve for x
    x = 2,737,223,131,546,498/85,931,983.41
  6. Step 6: Final answer
    x = 31,853,368.48

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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.