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Finding the Fourth Proportional to 81,191.75, 112,036.92 and 45,380.94

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Solution

The fourth proportional to 81,191.75, 112,036.92 and 45,380.94 is: 62,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,191.75 : 112,036.92 = 45,380.94 : x
  2. Step 2: Convert to fraction form
    81,191.75/112,036.92 = 45,380.94/x
  3. Step 3: Cross multiply
    81,191.75x = 112,036.92 × 45,380.94
  4. Step 4: Simplify right side
    81,191.75x = 5,084,340,744.30
  5. Step 5: Solve for x
    x = 5,084,340,744.30/81,191.75
  6. Step 6: Final answer
    x = 62,621.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.