Home / 81,132.42-112,535.56-78,974.58

Finding the Fourth Proportional to 81,132.42, 112,535.56 and 78,974.58

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Solution

The fourth proportional to 81,132.42, 112,535.56 and 78,974.58 is: 109,542.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.42 : 112,535.56 = 78,974.58 : x
  2. Step 2: Convert to fraction form
    81,132.42/112,535.56 = 78,974.58/x
  3. Step 3: Cross multiply
    81,132.42x = 112,535.56 × 78,974.58
  4. Step 4: Simplify right side
    81,132.42x = 8,887,448,586.06
  5. Step 5: Solve for x
    x = 8,887,448,586.06/81,132.42
  6. Step 6: Final answer
    x = 109,542.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.