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Finding the Fourth Proportional to 103,695.16, 155,542.65 and 28,815.27

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Solution

The fourth proportional to 103,695.16, 155,542.65 and 28,815.27 is: 43,222.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,695.16 : 155,542.65 = 28,815.27 : x
  2. Step 2: Convert to fraction form
    103,695.16/155,542.65 = 28,815.27/x
  3. Step 3: Cross multiply
    103,695.16x = 155,542.65 × 28,815.27
  4. Step 4: Simplify right side
    103,695.16x = 4,482,003,456.27
  5. Step 5: Solve for x
    x = 4,482,003,456.27/103,695.16
  6. Step 6: Final answer
    x = 43,222.88

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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.