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Finding the Fourth Proportional to 88,138.68, 121,513.89 and 70,049.80

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Solution

The fourth proportional to 88,138.68, 121,513.89 and 70,049.80 is: 96,575.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,138.68 : 121,513.89 = 70,049.80 : x
  2. Step 2: Convert to fraction form
    88,138.68/121,513.89 = 70,049.80/x
  3. Step 3: Cross multiply
    88,138.68x = 121,513.89 × 70,049.80
  4. Step 4: Simplify right side
    88,138.68x = 8,512,023,691.72
  5. Step 5: Solve for x
    x = 8,512,023,691.72/88,138.68
  6. Step 6: Final answer
    x = 96,575.35

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1.5x scale

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.