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Finding the Fourth Proportional to 67,708.80, 101,572.65 and 28,256.87

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Solution

The fourth proportional to 67,708.80, 101,572.65 and 28,256.87 is: 42,389.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,708.80 : 101,572.65 = 28,256.87 : x
  2. Step 2: Convert to fraction form
    67,708.80/101,572.65 = 28,256.87/x
  3. Step 3: Cross multiply
    67,708.80x = 101,572.65 × 28,256.87
  4. Step 4: Simplify right side
    67,708.80x = 2,870,125,166.61
  5. Step 5: Solve for x
    x = 2,870,125,166.61/67,708.80
  6. Step 6: Final answer
    x = 42,389.25

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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.