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Finding the Fourth Proportional to 138,180.72, 207,271.08 and 38,340.93

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Solution

The fourth proportional to 138,180.72, 207,271.08 and 38,340.93 is: 57,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,180.72 : 207,271.08 = 38,340.93 : x
  2. Step 2: Convert to fraction form
    138,180.72/207,271.08 = 38,340.93/x
  3. Step 3: Cross multiply
    138,180.72x = 207,271.08 × 38,340.93
  4. Step 4: Simplify right side
    138,180.72x = 7,946,965,969.30
  5. Step 5: Solve for x
    x = 7,946,965,969.30/138,180.72
  6. Step 6: Final answer
    x = 57,511.40

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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.