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Finding the Fourth Proportional to 72,082.60, 108,123.90 and 40,978.60

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Solution

The fourth proportional to 72,082.60, 108,123.90 and 40,978.60 is: 61,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,082.60 : 108,123.90 = 40,978.60 : x
  2. Step 2: Convert to fraction form
    72,082.60/108,123.90 = 40,978.60/x
  3. Step 3: Cross multiply
    72,082.60x = 108,123.90 × 40,978.60
  4. Step 4: Simplify right side
    72,082.60x = 4,430,766,048.54
  5. Step 5: Solve for x
    x = 4,430,766,048.54/72,082.60
  6. Step 6: Final answer
    x = 61,467.90

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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.