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Finding the Fourth Proportional to 124,156, 171,305.40 and 73,170.76

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Solution

The fourth proportional to 124,156, 171,305.40 and 73,170.76 is: 100,958.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,156 : 171,305.40 = 73,170.76 : x
  2. Step 2: Convert to fraction form
    124,156/171,305.40 = 73,170.76/x
  3. Step 3: Cross multiply
    124,156x = 171,305.40 × 73,170.76
  4. Step 4: Simplify right side
    124,156x = 12,534,546,310.10
  5. Step 5: Solve for x
    x = 12,534,546,310.10/124,156
  6. Step 6: Final answer
    x = 100,958.04

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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.