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Finding the Fourth Proportional to 72,082.10, 108,123.15 and 67,999.70

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Solution

The fourth proportional to 72,082.10, 108,123.15 and 67,999.70 is: 101,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,082.10 : 108,123.15 = 67,999.70 : x
  2. Step 2: Convert to fraction form
    72,082.10/108,123.15 = 67,999.70/x
  3. Step 3: Cross multiply
    72,082.10x = 108,123.15 × 67,999.70
  4. Step 4: Simplify right side
    72,082.10x = 7,352,341,763.06
  5. Step 5: Solve for x
    x = 7,352,341,763.06/72,082.10
  6. Step 6: Final answer
    x = 101,999.55

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Similar ratio
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1.5x scale

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.