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Finding the Fourth Proportional to 70,961.12, 106,410.76 and 20,348.98

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Solution

The fourth proportional to 70,961.12, 106,410.76 and 20,348.98 is: 30,514.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,961.12 : 106,410.76 = 20,348.98 : x
  2. Step 2: Convert to fraction form
    70,961.12/106,410.76 = 20,348.98/x
  3. Step 3: Cross multiply
    70,961.12x = 106,410.76 × 20,348.98
  4. Step 4: Simplify right side
    70,961.12x = 2,165,350,110.13
  5. Step 5: Solve for x
    x = 2,165,350,110.13/70,961.12
  6. Step 6: Final answer
    x = 30,514.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.