Home / 78,169.11-107,873.10-42,360

Finding the Fourth Proportional to 78,169.11, 107,873.10 and 42,360

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Solution

The fourth proportional to 78,169.11, 107,873.10 and 42,360 is: 58,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,169.11 : 107,873.10 = 42,360 : x
  2. Step 2: Convert to fraction form
    78,169.11/107,873.10 = 42,360/x
  3. Step 3: Cross multiply
    78,169.11x = 107,873.10 × 42,360
  4. Step 4: Simplify right side
    78,169.11x = 4,569,504,516
  5. Step 5: Solve for x
    x = 4,569,504,516/78,169.11
  6. Step 6: Final answer
    x = 58,456.65

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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.