Home / 81,981.20-122,989.08-26,572.88

Finding the Fourth Proportional to 81,981.20, 122,989.08 and 26,572.88

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Solution

The fourth proportional to 81,981.20, 122,989.08 and 26,572.88 is: 39,864.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.20 : 122,989.08 = 26,572.88 : x
  2. Step 2: Convert to fraction form
    81,981.20/122,989.08 = 26,572.88/x
  3. Step 3: Cross multiply
    81,981.20x = 122,989.08 × 26,572.88
  4. Step 4: Simplify right side
    81,981.20x = 3,268,173,449.21
  5. Step 5: Solve for x
    x = 3,268,173,449.21/81,981.20
  6. Step 6: Final answer
    x = 39,864.92

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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.