Home / 145,231.29-217,883.89-85,310.43

Finding the Fourth Proportional to 145,231.29, 217,883.89 and 85,310.43

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Solution

The fourth proportional to 145,231.29, 217,883.89 and 85,310.43 is: 127,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,231.29 : 217,883.89 = 85,310.43 : x
  2. Step 2: Convert to fraction form
    145,231.29/217,883.89 = 85,310.43/x
  3. Step 3: Cross multiply
    145,231.29x = 217,883.89 × 85,310.43
  4. Step 4: Simplify right side
    145,231.29x = 18,587,768,132.70
  5. Step 5: Solve for x
    x = 18,587,768,132.70/145,231.29
  6. Step 6: Final answer
    x = 127,987.36

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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.