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Finding the Fourth Proportional to 80,613.50, 110,992.53 and 73,140.11

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Solution

The fourth proportional to 80,613.50, 110,992.53 and 73,140.11 is: 100,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,613.50 : 110,992.53 = 73,140.11 : x
  2. Step 2: Convert to fraction form
    80,613.50/110,992.53 = 73,140.11/x
  3. Step 3: Cross multiply
    80,613.50x = 110,992.53 × 73,140.11
  4. Step 4: Simplify right side
    80,613.50x = 8,118,006,201.83
  5. Step 5: Solve for x
    x = 8,118,006,201.83/80,613.50
  6. Step 6: Final answer
    x = 100,702.81

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1.5x scale

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.