Home / 129,865.68-179,217.43-71,722.26

Finding the Fourth Proportional to 129,865.68, 179,217.43 and 71,722.26

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Solution

The fourth proportional to 129,865.68, 179,217.43 and 71,722.26 is: 98,978.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,865.68 : 179,217.43 = 71,722.26 : x
  2. Step 2: Convert to fraction form
    129,865.68/179,217.43 = 71,722.26/x
  3. Step 3: Cross multiply
    129,865.68x = 179,217.43 × 71,722.26
  4. Step 4: Simplify right side
    129,865.68x = 12,853,878,931.69
  5. Step 5: Solve for x
    x = 12,853,878,931.69/129,865.68
  6. Step 6: Final answer
    x = 98,978.26

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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.