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Finding the Fourth Proportional to 66,119.50, 91,244.91 and 36,311.50

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Solution

The fourth proportional to 66,119.50, 91,244.91 and 36,311.50 is: 50,109.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,119.50 : 91,244.91 = 36,311.50 : x
  2. Step 2: Convert to fraction form
    66,119.50/91,244.91 = 36,311.50/x
  3. Step 3: Cross multiply
    66,119.50x = 91,244.91 × 36,311.50
  4. Step 4: Simplify right side
    66,119.50x = 3,313,239,549.47
  5. Step 5: Solve for x
    x = 3,313,239,549.47/66,119.50
  6. Step 6: Final answer
    x = 50,109.87

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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.