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Finding the Fourth Proportional to 70,449.62, 105,717.36 and 28,321.80

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Solution

The fourth proportional to 70,449.62, 105,717.36 and 28,321.80 is: 42,499.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,449.62 : 105,717.36 = 28,321.80 : x
  2. Step 2: Convert to fraction form
    70,449.62/105,717.36 = 28,321.80/x
  3. Step 3: Cross multiply
    70,449.62x = 105,717.36 × 28,321.80
  4. Step 4: Simplify right side
    70,449.62x = 2,994,105,926.45
  5. Step 5: Solve for x
    x = 2,994,105,926.45/70,449.62
  6. Step 6: Final answer
    x = 42,499.96

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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.