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Finding the Fourth Proportional to 261,044.40, 391,566.60 and 136,369.20

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Solution

The fourth proportional to 261,044.40, 391,566.60 and 136,369.20 is: 204,553.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,044.40 : 391,566.60 = 136,369.20 : x
  2. Step 2: Convert to fraction form
    261,044.40/391,566.60 = 136,369.20/x
  3. Step 3: Cross multiply
    261,044.40x = 391,566.60 × 136,369.20
  4. Step 4: Simplify right side
    261,044.40x = 53,397,623,988.72
  5. Step 5: Solve for x
    x = 53,397,623,988.72/261,044.40
  6. Step 6: Final answer
    x = 204,553.80

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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.