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Finding the Fourth Proportional to 81,350.57, 122,042.96 and 28,047.50

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Solution

The fourth proportional to 81,350.57, 122,042.96 and 28,047.50 is: 42,077.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,350.57 : 122,042.96 = 28,047.50 : x
  2. Step 2: Convert to fraction form
    81,350.57/122,042.96 = 28,047.50/x
  3. Step 3: Cross multiply
    81,350.57x = 122,042.96 × 28,047.50
  4. Step 4: Simplify right side
    81,350.57x = 3,422,999,170.15
  5. Step 5: Solve for x
    x = 3,422,999,170.15/81,350.57
  6. Step 6: Final answer
    x = 42,077.14

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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.