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Finding the Fourth Proportional to 148,443.69, 204,865.25 and 81,388.65

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Solution

The fourth proportional to 148,443.69, 204,865.25 and 81,388.65 is: 112,323.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,443.69 : 204,865.25 = 81,388.65 : x
  2. Step 2: Convert to fraction form
    148,443.69/204,865.25 = 81,388.65/x
  3. Step 3: Cross multiply
    148,443.69x = 204,865.25 × 81,388.65
  4. Step 4: Simplify right side
    148,443.69x = 16,673,706,129.41
  5. Step 5: Solve for x
    x = 16,673,706,129.41/148,443.69
  6. Step 6: Final answer
    x = 112,323.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.