Home / 80,938.70-121,553.85-78,314.30

Finding the Fourth Proportional to 80,938.70, 121,553.85 and 78,314.30

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Solution

The fourth proportional to 80,938.70, 121,553.85 and 78,314.30 is: 117,612.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,938.70 : 121,553.85 = 78,314.30 : x
  2. Step 2: Convert to fraction form
    80,938.70/121,553.85 = 78,314.30/x
  3. Step 3: Cross multiply
    80,938.70x = 121,553.85 × 78,314.30
  4. Step 4: Simplify right side
    80,938.70x = 9,519,404,675.06
  5. Step 5: Solve for x
    x = 9,519,404,675.06/80,938.70
  6. Step 6: Final answer
    x = 117,612.52

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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.