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Finding the Fourth Proportional to 72,434.60, 108,587.10 and 28,046.60

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Solution

The fourth proportional to 72,434.60, 108,587.10 and 28,046.60 is: 42,044.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,434.60 : 108,587.10 = 28,046.60 : x
  2. Step 2: Convert to fraction form
    72,434.60/108,587.10 = 28,046.60/x
  3. Step 3: Cross multiply
    72,434.60x = 108,587.10 × 28,046.60
  4. Step 4: Simplify right side
    72,434.60x = 3,045,498,958.86
  5. Step 5: Solve for x
    x = 3,045,498,958.86/72,434.60
  6. Step 6: Final answer
    x = 42,044.81

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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.