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Finding the Fourth Proportional to 138,620.63, 207,900.29 and 38,753.98

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Solution

The fourth proportional to 138,620.63, 207,900.29 and 38,753.98 is: 58,122.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.63 : 207,900.29 = 38,753.98 : x
  2. Step 2: Convert to fraction form
    138,620.63/207,900.29 = 38,753.98/x
  3. Step 3: Cross multiply
    138,620.63x = 207,900.29 × 38,753.98
  4. Step 4: Simplify right side
    138,620.63x = 8,056,963,257.79
  5. Step 5: Solve for x
    x = 8,056,963,257.79/138,620.63
  6. Step 6: Final answer
    x = 58,122.40

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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.