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Finding the Fourth Proportional to 70,388.32, 105,508.32 and 25,986.64

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Solution

The fourth proportional to 70,388.32, 105,508.32 and 25,986.64 is: 38,952.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,388.32 : 105,508.32 = 25,986.64 : x
  2. Step 2: Convert to fraction form
    70,388.32/105,508.32 = 25,986.64/x
  3. Step 3: Cross multiply
    70,388.32x = 105,508.32 × 25,986.64
  4. Step 4: Simplify right side
    70,388.32x = 2,741,806,728.84
  5. Step 5: Solve for x
    x = 2,741,806,728.84/70,388.32
  6. Step 6: Final answer
    x = 38,952.58

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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.