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Finding the Fourth Proportional to 88,380, 121,964.42 and 48,636

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Solution

The fourth proportional to 88,380, 121,964.42 and 48,636 is: 67,117.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,380 : 121,964.42 = 48,636 : x
  2. Step 2: Convert to fraction form
    88,380/121,964.42 = 48,636/x
  3. Step 3: Cross multiply
    88,380x = 121,964.42 × 48,636
  4. Step 4: Simplify right side
    88,380x = 5,931,861,531.12
  5. Step 5: Solve for x
    x = 5,931,861,531.12/88,380
  6. Step 6: Final answer
    x = 67,117.69

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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.