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Finding the Fourth Proportional to 63,239.28, 87,312.60 and 39,375.60

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Solution

The fourth proportional to 63,239.28, 87,312.60 and 39,375.60 is: 54,364.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,239.28 : 87,312.60 = 39,375.60 : x
  2. Step 2: Convert to fraction form
    63,239.28/87,312.60 = 39,375.60/x
  3. Step 3: Cross multiply
    63,239.28x = 87,312.60 × 39,375.60
  4. Step 4: Simplify right side
    63,239.28x = 3,437,986,012.56
  5. Step 5: Solve for x
    x = 3,437,986,012.56/63,239.28
  6. Step 6: Final answer
    x = 54,364.72

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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.