Home / 78,327.80-117,528.15-40,930.10

Finding the Fourth Proportional to 78,327.80, 117,528.15 and 40,930.10

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Solution

The fourth proportional to 78,327.80, 117,528.15 and 40,930.10 is: 61,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,327.80 : 117,528.15 = 40,930.10 : x
  2. Step 2: Convert to fraction form
    78,327.80/117,528.15 = 40,930.10/x
  3. Step 3: Cross multiply
    78,327.80x = 117,528.15 × 40,930.10
  4. Step 4: Simplify right side
    78,327.80x = 4,810,438,932.32
  5. Step 5: Solve for x
    x = 4,810,438,932.32/78,327.80
  6. Step 6: Final answer
    x = 61,414.20

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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.