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Finding the Fourth Proportional to 156,661.88, 235,081.70 and 84,613.90

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Solution

The fourth proportional to 156,661.88, 235,081.70 and 84,613.90 is: 126,968.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,661.88 : 235,081.70 = 84,613.90 : x
  2. Step 2: Convert to fraction form
    156,661.88/235,081.70 = 84,613.90/x
  3. Step 3: Cross multiply
    156,661.88x = 235,081.70 × 84,613.90
  4. Step 4: Simplify right side
    156,661.88x = 19,891,179,244.10
  5. Step 5: Solve for x
    x = 19,891,179,244.10/156,661.88
  6. Step 6: Final answer
    x = 126,968.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.