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Finding the Fourth Proportional to 81,065.17, 111,868.90 and 45,255.78

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Solution

The fourth proportional to 81,065.17, 111,868.90 and 45,255.78 is: 62,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,065.17 : 111,868.90 = 45,255.78 : x
  2. Step 2: Convert to fraction form
    81,065.17/111,868.90 = 45,255.78/x
  3. Step 3: Cross multiply
    81,065.17x = 111,868.90 × 45,255.78
  4. Step 4: Simplify right side
    81,065.17x = 5,062,714,214.10
  5. Step 5: Solve for x
    x = 5,062,714,214.10/81,065.17
  6. Step 6: Final answer
    x = 62,452.40

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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.