Home / 129,865.12-179,216.66-71,721.68

Finding the Fourth Proportional to 129,865.12, 179,216.66 and 71,721.68

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Solution

The fourth proportional to 129,865.12, 179,216.66 and 71,721.68 is: 98,977.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,865.12 : 179,216.66 = 71,721.68 : x
  2. Step 2: Convert to fraction form
    129,865.12/179,216.66 = 71,721.68/x
  3. Step 3: Cross multiply
    129,865.12x = 179,216.66 × 71,721.68
  4. Step 4: Simplify right side
    129,865.12x = 12,853,719,222.41
  5. Step 5: Solve for x
    x = 12,853,719,222.41/129,865.12
  6. Step 6: Final answer
    x = 98,977.46

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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.