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Finding the Fourth Proportional to 67,690.92, 101,549.34 and 20,935.56

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Solution

The fourth proportional to 67,690.92, 101,549.34 and 20,935.56 is: 31,407.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,690.92 : 101,549.34 = 20,935.56 : x
  2. Step 2: Convert to fraction form
    67,690.92/101,549.34 = 20,935.56/x
  3. Step 3: Cross multiply
    67,690.92x = 101,549.34 × 20,935.56
  4. Step 4: Simplify right side
    67,690.92x = 2,125,992,300.53
  5. Step 5: Solve for x
    x = 2,125,992,300.53/67,690.92
  6. Step 6: Final answer
    x = 31,407.35

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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.