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Finding the Fourth Proportional to 156,080, 215,321.76 and 91,516.28

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Solution

The fourth proportional to 156,080, 215,321.76 and 91,516.28 is: 126,252.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,080 : 215,321.76 = 91,516.28 : x
  2. Step 2: Convert to fraction form
    156,080/215,321.76 = 91,516.28/x
  3. Step 3: Cross multiply
    156,080x = 215,321.76 × 91,516.28
  4. Step 4: Simplify right side
    156,080x = 19,705,446,478.25
  5. Step 5: Solve for x
    x = 19,705,446,478.25/156,080
  6. Step 6: Final answer
    x = 126,252.22

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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.