Home / 81,454.60-112,500.66-64,891.72

Finding the Fourth Proportional to 81,454.60, 112,500.66 and 64,891.72

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Solution

The fourth proportional to 81,454.60, 112,500.66 and 64,891.72 is: 89,624.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,454.60 : 112,500.66 = 64,891.72 : x
  2. Step 2: Convert to fraction form
    81,454.60/112,500.66 = 64,891.72/x
  3. Step 3: Cross multiply
    81,454.60x = 112,500.66 × 64,891.72
  4. Step 4: Simplify right side
    81,454.60x = 7,300,361,328.54
  5. Step 5: Solve for x
    x = 7,300,361,328.54/81,454.60
  6. Step 6: Final answer
    x = 89,624.91

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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.