Home / 81,065.12-111,865.20-45,257.40

Finding the Fourth Proportional to 81,065.12, 111,865.20 and 45,257.40

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Solution

The fourth proportional to 81,065.12, 111,865.20 and 45,257.40 is: 62,452.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,065.12 : 111,865.20 = 45,257.40 : x
  2. Step 2: Convert to fraction form
    81,065.12/111,865.20 = 45,257.40/x
  3. Step 3: Cross multiply
    81,065.12x = 111,865.20 × 45,257.40
  4. Step 4: Simplify right side
    81,065.12x = 5,062,728,102.48
  5. Step 5: Solve for x
    x = 5,062,728,102.48/81,065.12
  6. Step 6: Final answer
    x = 62,452.61

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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.