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Finding the Fourth Proportional to 60,474.96, 90,753.72 and 21,031.68

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Solution

The fourth proportional to 60,474.96, 90,753.72 and 21,031.68 is: 31,561.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,474.96 : 90,753.72 = 21,031.68 : x
  2. Step 2: Convert to fraction form
    60,474.96/90,753.72 = 21,031.68/x
  3. Step 3: Cross multiply
    60,474.96x = 90,753.72 × 21,031.68
  4. Step 4: Simplify right side
    60,474.96x = 1,908,703,197.85
  5. Step 5: Solve for x
    x = 1,908,703,197.85/60,474.96
  6. Step 6: Final answer
    x = 31,561.88

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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.