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Finding the Fourth Proportional to 121,620.26, 167,857.80 and 72,565.04

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Solution

The fourth proportional to 121,620.26, 167,857.80 and 72,565.04 is: 100,152.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,620.26 : 167,857.80 = 72,565.04 : x
  2. Step 2: Convert to fraction form
    121,620.26/167,857.80 = 72,565.04/x
  3. Step 3: Cross multiply
    121,620.26x = 167,857.80 × 72,565.04
  4. Step 4: Simplify right side
    121,620.26x = 12,180,607,971.31
  5. Step 5: Solve for x
    x = 12,180,607,971.31/121,620.26
  6. Step 6: Final answer
    x = 100,152.79

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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.