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Finding the Fourth Proportional to 156,581.69, 216,081.78 and 84,960.20

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Solution

The fourth proportional to 156,581.69, 216,081.78 and 84,960.20 is: 117,244.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,581.69 : 216,081.78 = 84,960.20 : x
  2. Step 2: Convert to fraction form
    156,581.69/216,081.78 = 84,960.20/x
  3. Step 3: Cross multiply
    156,581.69x = 216,081.78 × 84,960.20
  4. Step 4: Simplify right side
    156,581.69x = 18,358,350,164.75
  5. Step 5: Solve for x
    x = 18,358,350,164.75/156,581.69
  6. Step 6: Final answer
    x = 117,244.56

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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.