Home / 99,687.47-149,593.45-66,430.87

Finding the Fourth Proportional to 99,687.47, 149,593.45 and 66,430.87

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Solution

The fourth proportional to 99,687.47, 149,593.45 and 66,430.87 is: 99,687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,687.47 : 149,593.45 = 66,430.87 : x
  2. Step 2: Convert to fraction form
    99,687.47/149,593.45 = 66,430.87/x
  3. Step 3: Cross multiply
    99,687.47x = 149,593.45 × 66,430.87
  4. Step 4: Simplify right side
    99,687.47x = 9,937,622,614.30
  5. Step 5: Solve for x
    x = 9,937,622,614.30/99,687.47
  6. Step 6: Final answer
    x = 99,687.78

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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.