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Finding the Fourth Proportional to 156,867.41, 216,478.41 and 85,247.43

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Solution

The fourth proportional to 156,867.41, 216,478.41 and 85,247.43 is: 117,642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,867.41 : 216,478.41 = 85,247.43 : x
  2. Step 2: Convert to fraction form
    156,867.41/216,478.41 = 85,247.43/x
  3. Step 3: Cross multiply
    156,867.41x = 216,478.41 × 85,247.43
  4. Step 4: Simplify right side
    156,867.41x = 18,454,227,676.75
  5. Step 5: Solve for x
    x = 18,454,227,676.75/156,867.41
  6. Step 6: Final answer
    x = 117,642.21

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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.