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Finding the Fourth Proportional to 121,519.22, 167,711.68 and 70,521

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Solution

The fourth proportional to 121,519.22, 167,711.68 and 70,521 is: 97,327.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,519.22 : 167,711.68 = 70,521 : x
  2. Step 2: Convert to fraction form
    121,519.22/167,711.68 = 70,521/x
  3. Step 3: Cross multiply
    121,519.22x = 167,711.68 × 70,521
  4. Step 4: Simplify right side
    121,519.22x = 11,827,195,385.28
  5. Step 5: Solve for x
    x = 11,827,195,385.28/121,519.22
  6. Step 6: Final answer
    x = 97,327.78

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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.