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Finding the Fourth Proportional to 156,339.48, 215,747.64 and 84,717.66

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Solution

The fourth proportional to 156,339.48, 215,747.64 and 84,717.66 is: 116,909.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,339.48 : 215,747.64 = 84,717.66 : x
  2. Step 2: Convert to fraction form
    156,339.48/215,747.64 = 84,717.66/x
  3. Step 3: Cross multiply
    156,339.48x = 215,747.64 × 84,717.66
  4. Step 4: Simplify right side
    156,339.48x = 18,277,635,211.32
  5. Step 5: Solve for x
    x = 18,277,635,211.32/156,339.48
  6. Step 6: Final answer
    x = 116,909.91

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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.