Home / 86,751.26-129,767.06-81,436.85

Finding the Fourth Proportional to 86,751.26, 129,767.06 and 81,436.85

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Solution

The fourth proportional to 86,751.26, 129,767.06 and 81,436.85 is: 121,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,751.26 : 129,767.06 = 81,436.85 : x
  2. Step 2: Convert to fraction form
    86,751.26/129,767.06 = 81,436.85/x
  3. Step 3: Cross multiply
    86,751.26x = 129,767.06 × 81,436.85
  4. Step 4: Simplify right side
    86,751.26x = 10,567,820,600.16
  5. Step 5: Solve for x
    x = 10,567,820,600.16/86,751.26
  6. Step 6: Final answer
    x = 121,817.49

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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.