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Finding the Fourth Proportional to 261,480.70, 391,876.39 and 103,623.02

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Solution

The fourth proportional to 261,480.70, 391,876.39 and 103,623.02 is: 155,297.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,480.70 : 391,876.39 = 103,623.02 : x
  2. Step 2: Convert to fraction form
    261,480.70/391,876.39 = 103,623.02/x
  3. Step 3: Cross multiply
    261,480.70x = 391,876.39 × 103,623.02
  4. Step 4: Simplify right side
    261,480.70x = 40,607,414,998.50
  5. Step 5: Solve for x
    x = 40,607,414,998.50/261,480.70
  6. Step 6: Final answer
    x = 155,297.94

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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.