Home / 81,140.43-121,722.12-24,985.20

Finding the Fourth Proportional to 81,140.43, 121,722.12 and 24,985.20

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Solution

The fourth proportional to 81,140.43, 121,722.12 and 24,985.20 is: 37,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.43 : 121,722.12 = 24,985.20 : x
  2. Step 2: Convert to fraction form
    81,140.43/121,722.12 = 24,985.20/x
  3. Step 3: Cross multiply
    81,140.43x = 121,722.12 × 24,985.20
  4. Step 4: Simplify right side
    81,140.43x = 3,041,251,512.62
  5. Step 5: Solve for x
    x = 3,041,251,512.62/81,140.43
  6. Step 6: Final answer
    x = 37,481.33

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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.