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Finding the Fourth Proportional to 70,672.32, 106,007.60 and 20,750.61

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Solution

The fourth proportional to 70,672.32, 106,007.60 and 20,750.61 is: 31,125.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,672.32 : 106,007.60 = 20,750.61 : x
  2. Step 2: Convert to fraction form
    70,672.32/106,007.60 = 20,750.61/x
  3. Step 3: Cross multiply
    70,672.32x = 106,007.60 × 20,750.61
  4. Step 4: Simplify right side
    70,672.32x = 2,199,722,260.88
  5. Step 5: Solve for x
    x = 2,199,722,260.88/70,672.32
  6. Step 6: Final answer
    x = 31,125.66

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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.