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Finding the Fourth Proportional to 138,124.10, 207,156.18 and 49,383.74

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Solution

The fourth proportional to 138,124.10, 207,156.18 and 49,383.74 is: 74,064.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,124.10 : 207,156.18 = 49,383.74 : x
  2. Step 2: Convert to fraction form
    138,124.10/207,156.18 = 49,383.74/x
  3. Step 3: Cross multiply
    138,124.10x = 207,156.18 × 49,383.74
  4. Step 4: Simplify right side
    138,124.10x = 10,230,146,932.51
  5. Step 5: Solve for x
    x = 10,230,146,932.51/138,124.10
  6. Step 6: Final answer
    x = 74,064.89

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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.