Home / 86,587.26-129,774.75-49,178.78

Finding the Fourth Proportional to 86,587.26, 129,774.75 and 49,178.78

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Solution

The fourth proportional to 86,587.26, 129,774.75 and 49,178.78 is: 73,707.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,587.26 : 129,774.75 = 49,178.78 : x
  2. Step 2: Convert to fraction form
    86,587.26/129,774.75 = 49,178.78/x
  3. Step 3: Cross multiply
    86,587.26x = 129,774.75 × 49,178.78
  4. Step 4: Simplify right side
    86,587.26x = 6,382,163,230.93
  5. Step 5: Solve for x
    x = 6,382,163,230.93/86,587.26
  6. Step 6: Final answer
    x = 73,707.88

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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.