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Finding the Fourth Proportional to 80,965.80, 121,448.70 and 75,060.90

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Solution

The fourth proportional to 80,965.80, 121,448.70 and 75,060.90 is: 112,591.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,965.80 : 121,448.70 = 75,060.90 : x
  2. Step 2: Convert to fraction form
    80,965.80/121,448.70 = 75,060.90/x
  3. Step 3: Cross multiply
    80,965.80x = 121,448.70 × 75,060.90
  4. Step 4: Simplify right side
    80,965.80x = 9,116,048,725.83
  5. Step 5: Solve for x
    x = 9,116,048,725.83/80,965.80
  6. Step 6: Final answer
    x = 112,591.35

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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.