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Finding the Fourth Proportional to 138,448.86, 207,670.31 and 38,606.39

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Solution

The fourth proportional to 138,448.86, 207,670.31 and 38,606.39 is: 57,908.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,448.86 : 207,670.31 = 38,606.39 : x
  2. Step 2: Convert to fraction form
    138,448.86/207,670.31 = 38,606.39/x
  3. Step 3: Cross multiply
    138,448.86x = 207,670.31 × 38,606.39
  4. Step 4: Simplify right side
    138,448.86x = 8,017,401,450.20
  5. Step 5: Solve for x
    x = 8,017,401,450.20/138,448.86
  6. Step 6: Final answer
    x = 57,908.76

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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.