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Finding the Fourth Proportional to 129,876, 179,229.12 and 70,260

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Solution

The fourth proportional to 129,876, 179,229.12 and 70,260 is: 96,958.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,876 : 179,229.12 = 70,260 : x
  2. Step 2: Convert to fraction form
    129,876/179,229.12 = 70,260/x
  3. Step 3: Cross multiply
    129,876x = 179,229.12 × 70,260
  4. Step 4: Simplify right side
    129,876x = 12,592,637,971.20
  5. Step 5: Solve for x
    x = 12,592,637,971.20/129,876
  6. Step 6: Final answer
    x = 96,958.93

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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.