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Finding the Fourth Proportional to 156,042.68, 215,338.80 and 84,422.72

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Solution

The fourth proportional to 156,042.68, 215,338.80 and 84,422.72 is: 116,503.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,042.68 : 215,338.80 = 84,422.72 : x
  2. Step 2: Convert to fraction form
    156,042.68/215,338.80 = 84,422.72/x
  3. Step 3: Cross multiply
    156,042.68x = 215,338.80 × 84,422.72
  4. Step 4: Simplify right side
    156,042.68x = 18,179,487,217.54
  5. Step 5: Solve for x
    x = 18,179,487,217.54/156,042.68
  6. Step 6: Final answer
    x = 116,503.30

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1.5x scale

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.