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Finding the Fourth Proportional to 63,219.80, 87,239.82 and 39,345.72

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Solution

The fourth proportional to 63,219.80, 87,239.82 and 39,345.72 is: 54,294.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,219.80 : 87,239.82 = 39,345.72 : x
  2. Step 2: Convert to fraction form
    63,219.80/87,239.82 = 39,345.72/x
  3. Step 3: Cross multiply
    63,219.80x = 87,239.82 × 39,345.72
  4. Step 4: Simplify right side
    63,219.80x = 3,432,513,530.57
  5. Step 5: Solve for x
    x = 3,432,513,530.57/63,219.80
  6. Step 6: Final answer
    x = 54,294.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.