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Finding the Fourth Proportional to 207,894.40, 311,841.60 and 67,667.20

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Solution

The fourth proportional to 207,894.40, 311,841.60 and 67,667.20 is: 101,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,894.40 : 311,841.60 = 67,667.20 : x
  2. Step 2: Convert to fraction form
    207,894.40/311,841.60 = 67,667.20/x
  3. Step 3: Cross multiply
    207,894.40x = 311,841.60 × 67,667.20
  4. Step 4: Simplify right side
    207,894.40x = 21,101,447,915.52
  5. Step 5: Solve for x
    x = 21,101,447,915.52/207,894.40
  6. Step 6: Final answer
    x = 101,500.80

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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.