Home / 86,979.55-130,469.33-45,421.15

Finding the Fourth Proportional to 86,979.55, 130,469.33 and 45,421.15

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Solution

The fourth proportional to 86,979.55, 130,469.33 and 45,421.15 is: 68,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.55 : 130,469.33 = 45,421.15 : x
  2. Step 2: Convert to fraction form
    86,979.55/130,469.33 = 45,421.15/x
  3. Step 3: Cross multiply
    86,979.55x = 130,469.33 × 45,421.15
  4. Step 4: Simplify right side
    86,979.55x = 5,926,066,781.22
  5. Step 5: Solve for x
    x = 5,926,066,781.22/86,979.55
  6. Step 6: Final answer
    x = 68,131.73

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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.