Home / 138,612,726.40-207,695,140.80-87,403,100.80

Finding the Fourth Proportional to 138,612,726.40, 207,695,140.80 and 87,403,100.80

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Solution

The fourth proportional to 138,612,726.40, 207,695,140.80 and 87,403,100.80 is: 130,963,438.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612,726.40 : 207,695,140.80 = 87,403,100.80 : x
  2. Step 2: Convert to fraction form
    138,612,726.40/207,695,140.80 = 87,403,100.80/x
  3. Step 3: Cross multiply
    138,612,726.40x = 207,695,140.80 × 87,403,100.80
  4. Step 4: Simplify right side
    138,612,726.40x = 18,153,199,327,012,592
  5. Step 5: Solve for x
    x = 18,153,199,327,012,592/138,612,726.40
  6. Step 6: Final answer
    x = 130,963,438.92

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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.