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Finding the Fourth Proportional to 70,387.60, 105,434.20 and 32,979.60

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Solution

The fourth proportional to 70,387.60, 105,434.20 and 32,979.60 is: 49,400.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,387.60 : 105,434.20 = 32,979.60 : x
  2. Step 2: Convert to fraction form
    70,387.60/105,434.20 = 32,979.60/x
  3. Step 3: Cross multiply
    70,387.60x = 105,434.20 × 32,979.60
  4. Step 4: Simplify right side
    70,387.60x = 3,477,177,742.32
  5. Step 5: Solve for x
    x = 3,477,177,742.32/70,387.60
  6. Step 6: Final answer
    x = 49,400.43

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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.