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Finding the Fourth Proportional to 261,375.04, 392,015.56 and 69,250.80

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Solution

The fourth proportional to 261,375.04, 392,015.56 and 69,250.80 is: 103,863.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,375.04 : 392,015.56 = 69,250.80 : x
  2. Step 2: Convert to fraction form
    261,375.04/392,015.56 = 69,250.80/x
  3. Step 3: Cross multiply
    261,375.04x = 392,015.56 × 69,250.80
  4. Step 4: Simplify right side
    261,375.04x = 27,147,391,142.45
  5. Step 5: Solve for x
    x = 27,147,391,142.45/261,375.04
  6. Step 6: Final answer
    x = 103,863.75

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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.