Home / 156,748.23-216,314.15-85,129.65

Finding the Fourth Proportional to 156,748.23, 216,314.15 and 85,129.65

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Solution

The fourth proportional to 156,748.23, 216,314.15 and 85,129.65 is: 117,479.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,748.23 : 216,314.15 = 85,129.65 : x
  2. Step 2: Convert to fraction form
    156,748.23/216,314.15 = 85,129.65/x
  3. Step 3: Cross multiply
    156,748.23x = 216,314.15 × 85,129.65
  4. Step 4: Simplify right side
    156,748.23x = 18,414,747,453.90
  5. Step 5: Solve for x
    x = 18,414,747,453.90/156,748.23
  6. Step 6: Final answer
    x = 117,479.78

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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.