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Finding the Fourth Proportional to 80,860.60, 121,290.90 and 25,456.60

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Solution

The fourth proportional to 80,860.60, 121,290.90 and 25,456.60 is: 38,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.60 : 121,290.90 = 25,456.60 : x
  2. Step 2: Convert to fraction form
    80,860.60/121,290.90 = 25,456.60/x
  3. Step 3: Cross multiply
    80,860.60x = 121,290.90 × 25,456.60
  4. Step 4: Simplify right side
    80,860.60x = 3,087,653,924.94
  5. Step 5: Solve for x
    x = 3,087,653,924.94/80,860.60
  6. Step 6: Final answer
    x = 38,184.90

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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.