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Finding the Fourth Proportional to 156,486.68, 215,951.72 and 84,866.68

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Solution

The fourth proportional to 156,486.68, 215,951.72 and 84,866.68 is: 117,116.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,486.68 : 215,951.72 = 84,866.68 : x
  2. Step 2: Convert to fraction form
    156,486.68/215,951.72 = 84,866.68/x
  3. Step 3: Cross multiply
    156,486.68x = 215,951.72 × 84,866.68
  4. Step 4: Simplify right side
    156,486.68x = 18,327,105,516.69
  5. Step 5: Solve for x
    x = 18,327,105,516.69/156,486.68
  6. Step 6: Final answer
    x = 117,116.07

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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.