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Finding the Fourth Proportional to 80,803.48, 121,691.44 and 71,559.76

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Solution

The fourth proportional to 80,803.48, 121,691.44 and 71,559.76 is: 107,770.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,803.48 : 121,691.44 = 71,559.76 : x
  2. Step 2: Convert to fraction form
    80,803.48/121,691.44 = 71,559.76/x
  3. Step 3: Cross multiply
    80,803.48x = 121,691.44 × 71,559.76
  4. Step 4: Simplify right side
    80,803.48x = 8,708,210,240.45
  5. Step 5: Solve for x
    x = 8,708,210,240.45/80,803.48
  6. Step 6: Final answer
    x = 107,770.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.