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Finding the Fourth Proportional to 67,983.20, 101,974.80 and 28,617.20

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Solution

The fourth proportional to 67,983.20, 101,974.80 and 28,617.20 is: 42,925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,983.20 : 101,974.80 = 28,617.20 : x
  2. Step 2: Convert to fraction form
    67,983.20/101,974.80 = 28,617.20/x
  3. Step 3: Cross multiply
    67,983.20x = 101,974.80 × 28,617.20
  4. Step 4: Simplify right side
    67,983.20x = 2,918,233,246.56
  5. Step 5: Solve for x
    x = 2,918,233,246.56/67,983.20
  6. Step 6: Final answer
    x = 42,925.80

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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.