Home / 81,129.18-112,034.94-76,711.44

Finding the Fourth Proportional to 81,129.18, 112,034.94 and 76,711.44

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Solution

The fourth proportional to 81,129.18, 112,034.94 and 76,711.44 is: 105,934.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129.18 : 112,034.94 = 76,711.44 : x
  2. Step 2: Convert to fraction form
    81,129.18/112,034.94 = 76,711.44/x
  3. Step 3: Cross multiply
    81,129.18x = 112,034.94 × 76,711.44
  4. Step 4: Simplify right side
    81,129.18x = 8,594,361,577.71
  5. Step 5: Solve for x
    x = 8,594,361,577.71/81,129.18
  6. Step 6: Final answer
    x = 105,934.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.