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Finding the Fourth Proportional to 80,949.40, 121,424.10 and 74,728.60

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Solution

The fourth proportional to 80,949.40, 121,424.10 and 74,728.60 is: 112,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,949.40 : 121,424.10 = 74,728.60 : x
  2. Step 2: Convert to fraction form
    80,949.40/121,424.10 = 74,728.60/x
  3. Step 3: Cross multiply
    80,949.40x = 121,424.10 × 74,728.60
  4. Step 4: Simplify right side
    80,949.40x = 9,073,852,999.26
  5. Step 5: Solve for x
    x = 9,073,852,999.26/80,949.40
  6. Step 6: Final answer
    x = 112,092.90

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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.