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Finding the Fourth Proportional to 64,228, 88,689.36 and 40,394.56

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Solution

The fourth proportional to 64,228, 88,689.36 and 40,394.56 is: 55,778.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,228 : 88,689.36 = 40,394.56 : x
  2. Step 2: Convert to fraction form
    64,228/88,689.36 = 40,394.56/x
  3. Step 3: Cross multiply
    64,228x = 88,689.36 × 40,394.56
  4. Step 4: Simplify right side
    64,228x = 3,582,567,673.88
  5. Step 5: Solve for x
    x = 3,582,567,673.88/64,228
  6. Step 6: Final answer
    x = 55,778.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.