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Finding the Fourth Proportional to 112,715, 155,545.58 and 61,031.85

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Solution

The fourth proportional to 112,715, 155,545.58 and 61,031.85 is: 84,223.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,715 : 155,545.58 = 61,031.85 : x
  2. Step 2: Convert to fraction form
    112,715/155,545.58 = 61,031.85/x
  3. Step 3: Cross multiply
    112,715x = 155,545.58 × 61,031.85
  4. Step 4: Simplify right side
    112,715x = 9,493,234,506.72
  5. Step 5: Solve for x
    x = 9,493,234,506.72/112,715
  6. Step 6: Final answer
    x = 84,223.35

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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.