Home / 86,587.28-129,892.08-30,423.36

Finding the Fourth Proportional to 86,587.28, 129,892.08 and 30,423.36

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Solution

The fourth proportional to 86,587.28, 129,892.08 and 30,423.36 is: 45,638.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,587.28 : 129,892.08 = 30,423.36 : x
  2. Step 2: Convert to fraction form
    86,587.28/129,892.08 = 30,423.36/x
  3. Step 3: Cross multiply
    86,587.28x = 129,892.08 × 30,423.36
  4. Step 4: Simplify right side
    86,587.28x = 3,951,753,510.99
  5. Step 5: Solve for x
    x = 3,951,753,510.99/86,587.28
  6. Step 6: Final answer
    x = 45,638.96

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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.