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Finding the Fourth Proportional to 103,705.28, 155,324.52 and 72,679.04

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Solution

The fourth proportional to 103,705.28, 155,324.52 and 72,679.04 is: 108,854.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,705.28 : 155,324.52 = 72,679.04 : x
  2. Step 2: Convert to fraction form
    103,705.28/155,324.52 = 72,679.04/x
  3. Step 3: Cross multiply
    103,705.28x = 155,324.52 × 72,679.04
  4. Step 4: Simplify right side
    103,705.28x = 11,288,837,002.06
  5. Step 5: Solve for x
    x = 11,288,837,002.06/103,705.28
  6. Step 6: Final answer
    x = 108,854.99

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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.