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Finding the Fourth Proportional to 63,418.80, 95,139.11 and 21,302.90

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Solution

The fourth proportional to 63,418.80, 95,139.11 and 21,302.90 is: 31,958.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,418.80 : 95,139.11 = 21,302.90 : x
  2. Step 2: Convert to fraction form
    63,418.80/95,139.11 = 21,302.90/x
  3. Step 3: Cross multiply
    63,418.80x = 95,139.11 × 21,302.90
  4. Step 4: Simplify right side
    63,418.80x = 2,026,738,760.92
  5. Step 5: Solve for x
    x = 2,026,738,760.92/63,418.80
  6. Step 6: Final answer
    x = 31,958.01

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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.