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Finding the Fourth Proportional to 70,388.40, 105,524.20 and 26,006.80

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Solution

The fourth proportional to 70,388.40, 105,524.20 and 26,006.80 is: 38,988.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,388.40 : 105,524.20 = 26,006.80 : x
  2. Step 2: Convert to fraction form
    70,388.40/105,524.20 = 26,006.80/x
  3. Step 3: Cross multiply
    70,388.40x = 105,524.20 × 26,006.80
  4. Step 4: Simplify right side
    70,388.40x = 2,744,346,764.56
  5. Step 5: Solve for x
    x = 2,744,346,764.56/70,388.40
  6. Step 6: Final answer
    x = 38,988.62

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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.