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Finding the Fourth Proportional to 138,239.45, 207,373.89 and 38,399.84

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Solution

The fourth proportional to 138,239.45, 207,373.89 and 38,399.84 is: 57,603.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,239.45 : 207,373.89 = 38,399.84 : x
  2. Step 2: Convert to fraction form
    138,239.45/207,373.89 = 38,399.84/x
  3. Step 3: Cross multiply
    138,239.45x = 207,373.89 × 38,399.84
  4. Step 4: Simplify right side
    138,239.45x = 7,963,124,196.18
  5. Step 5: Solve for x
    x = 7,963,124,196.18/138,239.45
  6. Step 6: Final answer
    x = 57,603.85

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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.