Home / 78,104.28-117,132.21-28,177.90

Finding the Fourth Proportional to 78,104.28, 117,132.21 and 28,177.90

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Solution

The fourth proportional to 78,104.28, 117,132.21 and 28,177.90 is: 42,258.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,104.28 : 117,132.21 = 28,177.90 : x
  2. Step 2: Convert to fraction form
    78,104.28/117,132.21 = 28,177.90/x
  3. Step 3: Cross multiply
    78,104.28x = 117,132.21 × 28,177.90
  4. Step 4: Simplify right side
    78,104.28x = 3,300,539,407.33
  5. Step 5: Solve for x
    x = 3,300,539,407.33/78,104.28
  6. Step 6: Final answer
    x = 42,258.11

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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.