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Finding the Fourth Proportional to 70,138.80, 96,793.64 and 38,309.20

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Solution

The fourth proportional to 70,138.80, 96,793.64 and 38,309.20 is: 52,867.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,138.80 : 96,793.64 = 38,309.20 : x
  2. Step 2: Convert to fraction form
    70,138.80/96,793.64 = 38,309.20/x
  3. Step 3: Cross multiply
    70,138.80x = 96,793.64 × 38,309.20
  4. Step 4: Simplify right side
    70,138.80x = 3,708,086,913.49
  5. Step 5: Solve for x
    x = 3,708,086,913.49/70,138.80
  6. Step 6: Final answer
    x = 52,867.84

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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.