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Finding the Fourth Proportional to 72,458.64, 108,691.20 and 19,866.96

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Solution

The fourth proportional to 72,458.64, 108,691.20 and 19,866.96 is: 29,801.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,458.64 : 108,691.20 = 19,866.96 : x
  2. Step 2: Convert to fraction form
    72,458.64/108,691.20 = 19,866.96/x
  3. Step 3: Cross multiply
    72,458.64x = 108,691.20 × 19,866.96
  4. Step 4: Simplify right side
    72,458.64x = 2,159,363,722.75
  5. Step 5: Solve for x
    x = 2,159,363,722.75/72,458.64
  6. Step 6: Final answer
    x = 29,801.33

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1.5x scale

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.