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Finding the Fourth Proportional to 121,615.28, 167,857.12 and 71,330.48

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Solution

The fourth proportional to 121,615.28, 167,857.12 and 71,330.48 is: 98,452.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,615.28 : 167,857.12 = 71,330.48 : x
  2. Step 2: Convert to fraction form
    121,615.28/167,857.12 = 71,330.48/x
  3. Step 3: Cross multiply
    121,615.28x = 167,857.12 × 71,330.48
  4. Step 4: Simplify right side
    121,615.28x = 11,973,328,941.02
  5. Step 5: Solve for x
    x = 11,973,328,941.02/121,615.28
  6. Step 6: Final answer
    x = 98,452.50

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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.