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Finding the Fourth Proportional to 121,654.26, 167,904.72 and 72,599.04

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Solution

The fourth proportional to 121,654.26, 167,904.72 and 72,599.04 is: 100,199.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,654.26 : 167,904.72 = 72,599.04 : x
  2. Step 2: Convert to fraction form
    121,654.26/167,904.72 = 72,599.04/x
  3. Step 3: Cross multiply
    121,654.26x = 167,904.72 × 72,599.04
  4. Step 4: Simplify right side
    121,654.26x = 12,189,721,483.47
  5. Step 5: Solve for x
    x = 12,189,721,483.47/121,654.26
  6. Step 6: Final answer
    x = 100,199.71

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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.