Home / 78,015.42-117,010.98-25,424.55

Finding the Fourth Proportional to 78,015.42, 117,010.98 and 25,424.55

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Solution

The fourth proportional to 78,015.42, 117,010.98 and 25,424.55 is: 38,132.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.42 : 117,010.98 = 25,424.55 : x
  2. Step 2: Convert to fraction form
    78,015.42/117,010.98 = 25,424.55/x
  3. Step 3: Cross multiply
    78,015.42x = 117,010.98 × 25,424.55
  4. Step 4: Simplify right side
    78,015.42x = 2,974,951,511.56
  5. Step 5: Solve for x
    x = 2,974,951,511.56/78,015.42
  6. Step 6: Final answer
    x = 38,132.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.