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Finding the Fourth Proportional to 138,045.70, 207,068.55 and 122,299.30

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Solution

The fourth proportional to 138,045.70, 207,068.55 and 122,299.30 is: 183,448.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,045.70 : 207,068.55 = 122,299.30 : x
  2. Step 2: Convert to fraction form
    138,045.70/207,068.55 = 122,299.30/x
  3. Step 3: Cross multiply
    138,045.70x = 207,068.55 × 122,299.30
  4. Step 4: Simplify right side
    138,045.70x = 25,324,338,717.02
  5. Step 5: Solve for x
    x = 25,324,338,717.02/138,045.70
  6. Step 6: Final answer
    x = 183,448.95

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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.