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Finding the Fourth Proportional to 261,021, 391,531.50 and 113,277

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Solution

The fourth proportional to 261,021, 391,531.50 and 113,277 is: 169,915.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,021 : 391,531.50 = 113,277 : x
  2. Step 2: Convert to fraction form
    261,021/391,531.50 = 113,277/x
  3. Step 3: Cross multiply
    261,021x = 391,531.50 × 113,277
  4. Step 4: Simplify right side
    261,021x = 44,351,513,725.50
  5. Step 5: Solve for x
    x = 44,351,513,725.50/261,021
  6. Step 6: Final answer
    x = 169,915.50

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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.