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Finding the Fourth Proportional to 132,915.52, 199,384.08 and 39,421

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Solution

The fourth proportional to 132,915.52, 199,384.08 and 39,421 is: 59,134.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,915.52 : 199,384.08 = 39,421 : x
  2. Step 2: Convert to fraction form
    132,915.52/199,384.08 = 39,421/x
  3. Step 3: Cross multiply
    132,915.52x = 199,384.08 × 39,421
  4. Step 4: Simplify right side
    132,915.52x = 7,859,919,817.68
  5. Step 5: Solve for x
    x = 7,859,919,817.68/132,915.52
  6. Step 6: Final answer
    x = 59,134.70

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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.