Home / 78,116.57-107,800.26-42,305.75

Finding the Fourth Proportional to 78,116.57, 107,800.26 and 42,305.75

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Solution

The fourth proportional to 78,116.57, 107,800.26 and 42,305.75 is: 58,381.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,116.57 : 107,800.26 = 42,305.75 : x
  2. Step 2: Convert to fraction form
    78,116.57/107,800.26 = 42,305.75/x
  3. Step 3: Cross multiply
    78,116.57x = 107,800.26 × 42,305.75
  4. Step 4: Simplify right side
    78,116.57x = 4,560,570,849.50
  5. Step 5: Solve for x
    x = 4,560,570,849.50/78,116.57
  6. Step 6: Final answer
    x = 58,381.61

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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.