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Finding the Fourth Proportional to 70,043.68, 105,003.10 and 25,660.05

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Solution

The fourth proportional to 70,043.68, 105,003.10 and 25,660.05 is: 38,467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,043.68 : 105,003.10 = 25,660.05 : x
  2. Step 2: Convert to fraction form
    70,043.68/105,003.10 = 25,660.05/x
  3. Step 3: Cross multiply
    70,043.68x = 105,003.10 × 25,660.05
  4. Step 4: Simplify right side
    70,043.68x = 2,694,384,434.47
  5. Step 5: Solve for x
    x = 2,694,384,434.47/70,043.68
  6. Step 6: Final answer
    x = 38,467.21

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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.