Home / 78,211.05-117,287.42-40,755.03

Finding the Fourth Proportional to 78,211.05, 117,287.42 and 40,755.03

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Solution

The fourth proportional to 78,211.05, 117,287.42 and 40,755.03 is: 61,117.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,211.05 : 117,287.42 = 40,755.03 : x
  2. Step 2: Convert to fraction form
    78,211.05/117,287.42 = 40,755.03/x
  3. Step 3: Cross multiply
    78,211.05x = 117,287.42 × 40,755.03
  4. Step 4: Simplify right side
    78,211.05x = 4,780,052,116.95
  5. Step 5: Solve for x
    x = 4,780,052,116.95/78,211.05
  6. Step 6: Final answer
    x = 61,117.35

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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.