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Finding the Fourth Proportional to 90,578.52, 135,691.04 and 59,319

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Solution

The fourth proportional to 90,578.52, 135,691.04 and 59,319 is: 88,862.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,578.52 : 135,691.04 = 59,319 : x
  2. Step 2: Convert to fraction form
    90,578.52/135,691.04 = 59,319/x
  3. Step 3: Cross multiply
    90,578.52x = 135,691.04 × 59,319
  4. Step 4: Simplify right side
    90,578.52x = 8,049,056,801.76
  5. Step 5: Solve for x
    x = 8,049,056,801.76/90,578.52
  6. Step 6: Final answer
    x = 88,862.75

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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.