Home / 81,239.60-112,109.88-45,429.20

Finding the Fourth Proportional to 81,239.60, 112,109.88 and 45,429.20

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Solution

The fourth proportional to 81,239.60, 112,109.88 and 45,429.20 is: 62,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,239.60 : 112,109.88 = 45,429.20 : x
  2. Step 2: Convert to fraction form
    81,239.60/112,109.88 = 45,429.20/x
  3. Step 3: Cross multiply
    81,239.60x = 112,109.88 × 45,429.20
  4. Step 4: Simplify right side
    81,239.60x = 5,093,062,160.50
  5. Step 5: Solve for x
    x = 5,093,062,160.50/81,239.60
  6. Step 6: Final answer
    x = 62,691.87

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1.5x scale

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.