Home / 78,025.20-117,010.11-28,091.88

Finding the Fourth Proportional to 78,025.20, 117,010.11 and 28,091.88

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Solution

The fourth proportional to 78,025.20, 117,010.11 and 28,091.88 is: 42,127.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,025.20 : 117,010.11 = 28,091.88 : x
  2. Step 2: Convert to fraction form
    78,025.20/117,010.11 = 28,091.88/x
  3. Step 3: Cross multiply
    78,025.20x = 117,010.11 × 28,091.88
  4. Step 4: Simplify right side
    78,025.20x = 3,287,033,968.91
  5. Step 5: Solve for x
    x = 3,287,033,968.91/78,025.20
  6. Step 6: Final answer
    x = 42,127.85

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1.5x scale

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.