Home / 78,849.56-118,211.50-45,531.80

Finding the Fourth Proportional to 78,849.56, 118,211.50 and 45,531.80

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Solution

The fourth proportional to 78,849.56, 118,211.50 and 45,531.80 is: 68,261.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,849.56 : 118,211.50 = 45,531.80 : x
  2. Step 2: Convert to fraction form
    78,849.56/118,211.50 = 45,531.80/x
  3. Step 3: Cross multiply
    78,849.56x = 118,211.50 × 45,531.80
  4. Step 4: Simplify right side
    78,849.56x = 5,382,382,375.70
  5. Step 5: Solve for x
    x = 5,382,382,375.70/78,849.56
  6. Step 6: Final answer
    x = 68,261.41

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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.