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Finding the Fourth Proportional to 138,179.72, 207,269.58 and 38,339.93

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Solution

The fourth proportional to 138,179.72, 207,269.58 and 38,339.93 is: 57,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,179.72 : 207,269.58 = 38,339.93 : x
  2. Step 2: Convert to fraction form
    138,179.72/207,269.58 = 38,339.93/x
  3. Step 3: Cross multiply
    138,179.72x = 207,269.58 × 38,339.93
  4. Step 4: Simplify right side
    138,179.72x = 7,946,701,188.33
  5. Step 5: Solve for x
    x = 7,946,701,188.33/138,179.72
  6. Step 6: Final answer
    x = 57,509.90

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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.