Home / 129,867.18-179,219.51-71,723.76

Finding the Fourth Proportional to 129,867.18, 179,219.51 and 71,723.76

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Solution

The fourth proportional to 129,867.18, 179,219.51 and 71,723.76 is: 98,980.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,867.18 : 179,219.51 = 71,723.76 : x
  2. Step 2: Convert to fraction form
    129,867.18/179,219.51 = 71,723.76/x
  3. Step 3: Cross multiply
    129,867.18x = 179,219.51 × 71,723.76
  4. Step 4: Simplify right side
    129,867.18x = 12,854,296,763.94
  5. Step 5: Solve for x
    x = 12,854,296,763.94/129,867.18
  6. Step 6: Final answer
    x = 98,980.33

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1.5x scale

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.