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Finding the Fourth Proportional to 70,908.60, 97,847.34 and 40,687.80

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Solution

The fourth proportional to 70,908.60, 97,847.34 and 40,687.80 is: 56,145.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,908.60 : 97,847.34 = 40,687.80 : x
  2. Step 2: Convert to fraction form
    70,908.60/97,847.34 = 40,687.80/x
  3. Step 3: Cross multiply
    70,908.60x = 97,847.34 × 40,687.80
  4. Step 4: Simplify right side
    70,908.60x = 3,981,193,000.45
  5. Step 5: Solve for x
    x = 3,981,193,000.45/70,908.60
  6. Step 6: Final answer
    x = 56,145.42

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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.