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Finding the Fourth Proportional to 121,520, 167,704.08 and 71,235.20

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Solution

The fourth proportional to 121,520, 167,704.08 and 71,235.20 is: 98,308.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,520 : 167,704.08 = 71,235.20 : x
  2. Step 2: Convert to fraction form
    121,520/167,704.08 = 71,235.20/x
  3. Step 3: Cross multiply
    121,520x = 167,704.08 × 71,235.20
  4. Step 4: Simplify right side
    121,520x = 11,946,433,679.62
  5. Step 5: Solve for x
    x = 11,946,433,679.62/121,520
  6. Step 6: Final answer
    x = 98,308.37

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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.