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Finding the Fourth Proportional to 129,818.78, 179,149.86 and 70,202.78

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Solution

The fourth proportional to 129,818.78, 179,149.86 and 70,202.78 is: 96,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,818.78 : 179,149.86 = 70,202.78 : x
  2. Step 2: Convert to fraction form
    129,818.78/179,149.86 = 70,202.78/x
  3. Step 3: Cross multiply
    129,818.78x = 179,149.86 × 70,202.78
  4. Step 4: Simplify right side
    129,818.78x = 12,576,818,208.61
  5. Step 5: Solve for x
    x = 12,576,818,208.61/129,818.78
  6. Step 6: Final answer
    x = 96,879.81

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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.