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Finding the Fourth Proportional to 80,920.88, 121,381.31 and 25,516.88

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Solution

The fourth proportional to 80,920.88, 121,381.31 and 25,516.88 is: 38,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,920.88 : 121,381.31 = 25,516.88 : x
  2. Step 2: Convert to fraction form
    80,920.88/121,381.31 = 25,516.88/x
  3. Step 3: Cross multiply
    80,920.88x = 121,381.31 × 25,516.88
  4. Step 4: Simplify right side
    80,920.88x = 3,097,272,321.51
  5. Step 5: Solve for x
    x = 3,097,272,321.51/80,920.88
  6. Step 6: Final answer
    x = 38,275.32

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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.