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Finding the Fourth Proportional to 121,575.28, 167,801.88 and 71,290.48

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Solution

The fourth proportional to 121,575.28, 167,801.88 and 71,290.48 is: 98,397.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,575.28 : 167,801.88 = 71,290.48 : x
  2. Step 2: Convert to fraction form
    121,575.28/167,801.88 = 71,290.48/x
  3. Step 3: Cross multiply
    121,575.28x = 167,801.88 × 71,290.48
  4. Step 4: Simplify right side
    121,575.28x = 11,962,676,570.10
  5. Step 5: Solve for x
    x = 11,962,676,570.10/121,575.28
  6. Step 6: Final answer
    x = 98,397.28

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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.