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Finding the Fourth Proportional to 156,066.62, 215,371.24 and 84,447.90

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Solution

The fourth proportional to 156,066.62, 215,371.24 and 84,447.90 is: 116,537.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,066.62 : 215,371.24 = 84,447.90 : x
  2. Step 2: Convert to fraction form
    156,066.62/215,371.24 = 84,447.90/x
  3. Step 3: Cross multiply
    156,066.62x = 215,371.24 × 84,447.90
  4. Step 4: Simplify right side
    156,066.62x = 18,187,648,727.28
  5. Step 5: Solve for x
    x = 18,187,648,727.28/156,066.62
  6. Step 6: Final answer
    x = 116,537.73

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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.