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Finding the Fourth Proportional to 121,481.86, 167,649.13 and 70,490.74

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Solution

The fourth proportional to 121,481.86, 167,649.13 and 70,490.74 is: 97,279.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,481.86 : 167,649.13 = 70,490.74 : x
  2. Step 2: Convert to fraction form
    121,481.86/167,649.13 = 70,490.74/x
  3. Step 3: Cross multiply
    121,481.86x = 167,649.13 × 70,490.74
  4. Step 4: Simplify right side
    121,481.86x = 11,817,711,234.06
  5. Step 5: Solve for x
    x = 11,817,711,234.06/121,481.86
  6. Step 6: Final answer
    x = 97,279.64

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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.