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Finding the Fourth Proportional to 138,467.67, 207,703.17 and 38,621.79

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Solution

The fourth proportional to 138,467.67, 207,703.17 and 38,621.79 is: 57,933.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,467.67 : 207,703.17 = 38,621.79 : x
  2. Step 2: Convert to fraction form
    138,467.67/207,703.17 = 38,621.79/x
  3. Step 3: Cross multiply
    138,467.67x = 207,703.17 × 38,621.79
  4. Step 4: Simplify right side
    138,467.67x = 8,021,868,214.07
  5. Step 5: Solve for x
    x = 8,021,868,214.07/138,467.67
  6. Step 6: Final answer
    x = 57,933.15

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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.