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Finding the Fourth Proportional to 121,932.66, 168,293.39 and 74,201.39

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Solution

The fourth proportional to 121,932.66, 168,293.39 and 74,201.39 is: 102,413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,932.66 : 168,293.39 = 74,201.39 : x
  2. Step 2: Convert to fraction form
    121,932.66/168,293.39 = 74,201.39/x
  3. Step 3: Cross multiply
    121,932.66x = 168,293.39 × 74,201.39
  4. Step 4: Simplify right side
    121,932.66x = 12,487,602,253.34
  5. Step 5: Solve for x
    x = 12,487,602,253.34/121,932.66
  6. Step 6: Final answer
    x = 102,413.92

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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.