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Finding the Fourth Proportional to 156,641.29, 216,165.17 and 85,021.29

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Solution

The fourth proportional to 156,641.29, 216,165.17 and 85,021.29 is: 117,329.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,641.29 : 216,165.17 = 85,021.29 : x
  2. Step 2: Convert to fraction form
    156,641.29/216,165.17 = 85,021.29/x
  3. Step 3: Cross multiply
    156,641.29x = 216,165.17 × 85,021.29
  4. Step 4: Simplify right side
    156,641.29x = 18,378,641,606.47
  5. Step 5: Solve for x
    x = 18,378,641,606.47/156,641.29
  6. Step 6: Final answer
    x = 117,329.48

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1.5x scale

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.