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Finding the Fourth Proportional to 72,349.17, 108,531.28 and 19,758.66

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Solution

The fourth proportional to 72,349.17, 108,531.28 and 19,758.66 is: 29,640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,349.17 : 108,531.28 = 19,758.66 : x
  2. Step 2: Convert to fraction form
    72,349.17/108,531.28 = 19,758.66/x
  3. Step 3: Cross multiply
    72,349.17x = 108,531.28 × 19,758.66
  4. Step 4: Simplify right side
    72,349.17x = 2,144,432,660.88
  5. Step 5: Solve for x
    x = 2,144,432,660.88/72,349.17
  6. Step 6: Final answer
    x = 29,640.05

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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.