Home / 86,593.20-129,780.45-42,124.20

Finding the Fourth Proportional to 86,593.20, 129,780.45 and 42,124.20

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Solution

The fourth proportional to 86,593.20, 129,780.45 and 42,124.20 is: 63,133.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,593.20 : 129,780.45 = 42,124.20 : x
  2. Step 2: Convert to fraction form
    86,593.20/129,780.45 = 42,124.20/x
  3. Step 3: Cross multiply
    86,593.20x = 129,780.45 × 42,124.20
  4. Step 4: Simplify right side
    86,593.20x = 5,466,897,631.89
  5. Step 5: Solve for x
    x = 5,466,897,631.89/86,593.20
  6. Step 6: Final answer
    x = 63,133.11

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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.