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Finding the Fourth Proportional to 261,489.70, 391,889.89 and 103,632.02

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Solution

The fourth proportional to 261,489.70, 391,889.89 and 103,632.02 is: 155,311.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,489.70 : 391,889.89 = 103,632.02 : x
  2. Step 2: Convert to fraction form
    261,489.70/391,889.89 = 103,632.02/x
  3. Step 3: Cross multiply
    261,489.70x = 391,889.89 × 103,632.02
  4. Step 4: Simplify right side
    261,489.70x = 40,612,340,918.28
  5. Step 5: Solve for x
    x = 40,612,340,918.28/261,489.70
  6. Step 6: Final answer
    x = 155,311.44

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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.