Home / 129,867.12-179,219.42-71,723.68

Finding the Fourth Proportional to 129,867.12, 179,219.42 and 71,723.68

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Solution

The fourth proportional to 129,867.12, 179,219.42 and 71,723.68 is: 98,980.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,867.12 : 179,219.42 = 71,723.68 : x
  2. Step 2: Convert to fraction form
    129,867.12/179,219.42 = 71,723.68/x
  3. Step 3: Cross multiply
    129,867.12x = 179,219.42 × 71,723.68
  4. Step 4: Simplify right side
    129,867.12x = 12,854,276,329.87
  5. Step 5: Solve for x
    x = 12,854,276,329.87/129,867.12
  6. Step 6: Final answer
    x = 98,980.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.