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Finding the Fourth Proportional to 123,217.11, 170,026.88 and 90,968.90

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Solution

The fourth proportional to 123,217.11, 170,026.88 and 90,968.90 is: 125,527.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,217.11 : 170,026.88 = 90,968.90 : x
  2. Step 2: Convert to fraction form
    123,217.11/170,026.88 = 90,968.90/x
  3. Step 3: Cross multiply
    123,217.11x = 170,026.88 × 90,968.90
  4. Step 4: Simplify right side
    123,217.11x = 15,467,156,939.05
  5. Step 5: Solve for x
    x = 15,467,156,939.05/123,217.11
  6. Step 6: Final answer
    x = 125,527.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.