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Finding the Fourth Proportional to 70,309.33, 105,358.29 and 28,147.61

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Solution

The fourth proportional to 70,309.33, 105,358.29 and 28,147.61 is: 42,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,309.33 : 105,358.29 = 28,147.61 : x
  2. Step 2: Convert to fraction form
    70,309.33/105,358.29 = 28,147.61/x
  3. Step 3: Cross multiply
    70,309.33x = 105,358.29 × 28,147.61
  4. Step 4: Simplify right side
    70,309.33x = 2,965,584,215.03
  5. Step 5: Solve for x
    x = 2,965,584,215.03/70,309.33
  6. Step 6: Final answer
    x = 42,179.10

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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.