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Finding the Fourth Proportional to 156,425.58, 215,866.62 and 84,805.38

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Solution

The fourth proportional to 156,425.58, 215,866.62 and 84,805.38 is: 117,031.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,425.58 : 215,866.62 = 84,805.38 : x
  2. Step 2: Convert to fraction form
    156,425.58/215,866.62 = 84,805.38/x
  3. Step 3: Cross multiply
    156,425.58x = 215,866.62 × 84,805.38
  4. Step 4: Simplify right side
    156,425.58x = 18,306,650,738.42
  5. Step 5: Solve for x
    x = 18,306,650,738.42/156,425.58
  6. Step 6: Final answer
    x = 117,031.06

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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.