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Finding the Fourth Proportional to 80,963.20, 121,444.80 and 25,559.20

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Solution

The fourth proportional to 80,963.20, 121,444.80 and 25,559.20 is: 38,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,963.20 : 121,444.80 = 25,559.20 : x
  2. Step 2: Convert to fraction form
    80,963.20/121,444.80 = 25,559.20/x
  3. Step 3: Cross multiply
    80,963.20x = 121,444.80 × 25,559.20
  4. Step 4: Simplify right side
    80,963.20x = 3,104,031,932.16
  5. Step 5: Solve for x
    x = 3,104,031,932.16/80,963.20
  6. Step 6: Final answer
    x = 38,338.80

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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.