Home / 78,872.12-108,839.28-43,061.60

Finding the Fourth Proportional to 78,872.12, 108,839.28 and 43,061.60

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Solution

The fourth proportional to 78,872.12, 108,839.28 and 43,061.60 is: 59,422.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,872.12 : 108,839.28 = 43,061.60 : x
  2. Step 2: Convert to fraction form
    78,872.12/108,839.28 = 43,061.60/x
  3. Step 3: Cross multiply
    78,872.12x = 108,839.28 × 43,061.60
  4. Step 4: Simplify right side
    78,872.12x = 4,686,793,539.65
  5. Step 5: Solve for x
    x = 4,686,793,539.65/78,872.12
  6. Step 6: Final answer
    x = 59,422.69

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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.