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Finding the Fourth Proportional to 70,360.92, 105,519.31 and 20,444.47

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Solution

The fourth proportional to 70,360.92, 105,519.31 and 20,444.47 is: 30,660.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,360.92 : 105,519.31 = 20,444.47 : x
  2. Step 2: Convert to fraction form
    70,360.92/105,519.31 = 20,444.47/x
  3. Step 3: Cross multiply
    70,360.92x = 105,519.31 × 20,444.47
  4. Step 4: Simplify right side
    70,360.92x = 2,157,286,052.81
  5. Step 5: Solve for x
    x = 2,157,286,052.81/70,360.92
  6. Step 6: Final answer
    x = 30,660.29

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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.