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Finding the Fourth Proportional to 88,078.39, 121,380.39 and 86,458.95

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Solution

The fourth proportional to 88,078.39, 121,380.39 and 86,458.95 is: 119,148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,078.39 : 121,380.39 = 86,458.95 : x
  2. Step 2: Convert to fraction form
    88,078.39/121,380.39 = 86,458.95/x
  3. Step 3: Cross multiply
    88,078.39x = 121,380.39 × 86,458.95
  4. Step 4: Simplify right side
    88,078.39x = 10,494,420,941.15
  5. Step 5: Solve for x
    x = 10,494,420,941.15/88,078.39
  6. Step 6: Final answer
    x = 119,148.65

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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.