Home / 103,781.12-155,572-66,235.20

Finding the Fourth Proportional to 103,781.12, 155,572 and 66,235.20

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Solution

The fourth proportional to 103,781.12, 155,572 and 66,235.20 is: 99,289.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,781.12 : 155,572 = 66,235.20 : x
  2. Step 2: Convert to fraction form
    103,781.12/155,572 = 66,235.20/x
  3. Step 3: Cross multiply
    103,781.12x = 155,572 × 66,235.20
  4. Step 4: Simplify right side
    103,781.12x = 10,304,342,534.40
  5. Step 5: Solve for x
    x = 10,304,342,534.40/103,781.12
  6. Step 6: Final answer
    x = 99,289.18

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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.