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Finding the Fourth Proportional to 71,060.93, 106,581.68 and 21,148.73

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Solution

The fourth proportional to 71,060.93, 106,581.68 and 21,148.73 is: 31,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,060.93 : 106,581.68 = 21,148.73 : x
  2. Step 2: Convert to fraction form
    71,060.93/106,581.68 = 21,148.73/x
  3. Step 3: Cross multiply
    71,060.93x = 106,581.68 × 21,148.73
  4. Step 4: Simplify right side
    71,060.93x = 2,254,067,067.52
  5. Step 5: Solve for x
    x = 2,254,067,067.52/71,060.93
  6. Step 6: Final answer
    x = 31,720.20

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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.