Home / 86,463.56-129,711-42,090.28

Finding the Fourth Proportional to 86,463.56, 129,711 and 42,090.28

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Solution

The fourth proportional to 86,463.56, 129,711 and 42,090.28 is: 63,143.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,463.56 : 129,711 = 42,090.28 : x
  2. Step 2: Convert to fraction form
    86,463.56/129,711 = 42,090.28/x
  3. Step 3: Cross multiply
    86,463.56x = 129,711 × 42,090.28
  4. Step 4: Simplify right side
    86,463.56x = 5,459,572,309.08
  5. Step 5: Solve for x
    x = 5,459,572,309.08/86,463.56
  6. Step 6: Final answer
    x = 63,143.04

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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.