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Finding the Fourth Proportional to 121,235.59, 167,374.52 and 81,017.47

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Solution

The fourth proportional to 121,235.59, 167,374.52 and 81,017.47 is: 111,850.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,235.59 : 167,374.52 = 81,017.47 : x
  2. Step 2: Convert to fraction form
    121,235.59/167,374.52 = 81,017.47/x
  3. Step 3: Cross multiply
    121,235.59x = 167,374.52 × 81,017.47
  4. Step 4: Simplify right side
    121,235.59x = 13,560,260,152.86
  5. Step 5: Solve for x
    x = 13,560,260,152.86/121,235.59
  6. Step 6: Final answer
    x = 111,850.49

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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.