Home / 156,179.76-215,529.12-87,269.28

Finding the Fourth Proportional to 156,179.76, 215,529.12 and 87,269.28

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Solution

The fourth proportional to 156,179.76, 215,529.12 and 87,269.28 is: 120,432.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,179.76 : 215,529.12 = 87,269.28 : x
  2. Step 2: Convert to fraction form
    156,179.76/215,529.12 = 87,269.28/x
  3. Step 3: Cross multiply
    156,179.76x = 215,529.12 × 87,269.28
  4. Step 4: Simplify right side
    156,179.76x = 18,809,071,121.43
  5. Step 5: Solve for x
    x = 18,809,071,121.43/156,179.76
  6. Step 6: Final answer
    x = 120,432.19

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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.