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Finding the Fourth Proportional to 88,390.67, 121,976.78 and 48,103.57

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Solution

The fourth proportional to 88,390.67, 121,976.78 and 48,103.57 is: 66,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,390.67 : 121,976.78 = 48,103.57 : x
  2. Step 2: Convert to fraction form
    88,390.67/121,976.78 = 48,103.57/x
  3. Step 3: Cross multiply
    88,390.67x = 121,976.78 × 48,103.57
  4. Step 4: Simplify right side
    88,390.67x = 5,867,518,575.10
  5. Step 5: Solve for x
    x = 5,867,518,575.10/88,390.67
  6. Step 6: Final answer
    x = 66,381.65

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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.