Home / 86,078.65-129,136.26-26,918.79

Finding the Fourth Proportional to 86,078.65, 129,136.26 and 26,918.79

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Solution

The fourth proportional to 86,078.65, 129,136.26 and 26,918.79 is: 40,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,078.65 : 129,136.26 = 26,918.79 : x
  2. Step 2: Convert to fraction form
    86,078.65/129,136.26 = 26,918.79/x
  3. Step 3: Cross multiply
    86,078.65x = 129,136.26 × 26,918.79
  4. Step 4: Simplify right side
    86,078.65x = 3,476,191,864.33
  5. Step 5: Solve for x
    x = 3,476,191,864.33/86,078.65
  6. Step 6: Final answer
    x = 40,383.90

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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.