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Finding the Fourth Proportional to 42,474.78, 63,712.10 and 19,073.88

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Solution

The fourth proportional to 42,474.78, 63,712.10 and 19,073.88 is: 28,610.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,474.78 : 63,712.10 = 19,073.88 : x
  2. Step 2: Convert to fraction form
    42,474.78/63,712.10 = 19,073.88/x
  3. Step 3: Cross multiply
    42,474.78x = 63,712.10 × 19,073.88
  4. Step 4: Simplify right side
    42,474.78x = 1,215,236,997.63
  5. Step 5: Solve for x
    x = 1,215,236,997.63/42,474.78
  6. Step 6: Final answer
    x = 28,610.79

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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.