Home / 81,385.60-122,066.70-31,489.24

Finding the Fourth Proportional to 81,385.60, 122,066.70 and 31,489.24

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Solution

The fourth proportional to 81,385.60, 122,066.70 and 31,489.24 is: 47,229.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,385.60 : 122,066.70 = 31,489.24 : x
  2. Step 2: Convert to fraction form
    81,385.60/122,066.70 = 31,489.24/x
  3. Step 3: Cross multiply
    81,385.60x = 122,066.70 × 31,489.24
  4. Step 4: Simplify right side
    81,385.60x = 3,843,787,612.31
  5. Step 5: Solve for x
    x = 3,843,787,612.31/81,385.60
  6. Step 6: Final answer
    x = 47,229.33

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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.