Home / 231,387.90-347,019.57-81,608.75

Finding the Fourth Proportional to 231,387.90, 347,019.57 and 81,608.75

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Solution

The fourth proportional to 231,387.90, 347,019.57 and 81,608.75 is: 122,391.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,387.90 : 347,019.57 = 81,608.75 : x
  2. Step 2: Convert to fraction form
    231,387.90/347,019.57 = 81,608.75/x
  3. Step 3: Cross multiply
    231,387.90x = 347,019.57 × 81,608.75
  4. Step 4: Simplify right side
    231,387.90x = 28,319,833,333.24
  5. Step 5: Solve for x
    x = 28,319,833,333.24/231,387.90
  6. Step 6: Final answer
    x = 122,391.16

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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.