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Finding the Fourth Proportional to 121,587.78, 167,819.13 and 71,302.98

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Solution

The fourth proportional to 121,587.78, 167,819.13 and 71,302.98 is: 98,414.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.78 : 167,819.13 = 71,302.98 : x
  2. Step 2: Convert to fraction form
    121,587.78/167,819.13 = 71,302.98/x
  3. Step 3: Cross multiply
    121,587.78x = 167,819.13 × 71,302.98
  4. Step 4: Simplify right side
    121,587.78x = 11,966,004,070.01
  5. Step 5: Solve for x
    x = 11,966,004,070.01/121,587.78
  6. Step 6: Final answer
    x = 98,414.53

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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.