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Finding the Fourth Proportional to 72,572.35, 108,865.40 and 28,202.52

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Solution

The fourth proportional to 72,572.35, 108,865.40 and 28,202.52 is: 42,306.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,572.35 : 108,865.40 = 28,202.52 : x
  2. Step 2: Convert to fraction form
    72,572.35/108,865.40 = 28,202.52/x
  3. Step 3: Cross multiply
    72,572.35x = 108,865.40 × 28,202.52
  4. Step 4: Simplify right side
    72,572.35x = 3,070,278,888.04
  5. Step 5: Solve for x
    x = 3,070,278,888.04/72,572.35
  6. Step 6: Final answer
    x = 42,306.46

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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.