Home / 156,106.80-215,374.30-88,115.76

Finding the Fourth Proportional to 156,106.80, 215,374.30 and 88,115.76

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Solution

The fourth proportional to 156,106.80, 215,374.30 and 88,115.76 is: 121,569.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,106.80 : 215,374.30 = 88,115.76 : x
  2. Step 2: Convert to fraction form
    156,106.80/215,374.30 = 88,115.76/x
  3. Step 3: Cross multiply
    156,106.80x = 215,374.30 × 88,115.76
  4. Step 4: Simplify right side
    156,106.80x = 18,977,870,128.97
  5. Step 5: Solve for x
    x = 18,977,870,128.97/156,106.80
  6. Step 6: Final answer
    x = 121,569.79

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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.