Home / 103,499.31-155,233.36-66,319.20

Finding the Fourth Proportional to 103,499.31, 155,233.36 and 66,319.20

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Solution

The fourth proportional to 103,499.31, 155,233.36 and 66,319.20 is: 99,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,499.31 : 155,233.36 = 66,319.20 : x
  2. Step 2: Convert to fraction form
    103,499.31/155,233.36 = 66,319.20/x
  3. Step 3: Cross multiply
    103,499.31x = 155,233.36 × 66,319.20
  4. Step 4: Simplify right side
    103,499.31x = 10,294,951,472.35
  5. Step 5: Solve for x
    x = 10,294,951,472.35/103,499.31
  6. Step 6: Final answer
    x = 99,468.80

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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.