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Finding the Fourth Proportional to 66,217.40, 99,239.70 and 30,674.60

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Solution

The fourth proportional to 66,217.40, 99,239.70 and 30,674.60 is: 45,971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,217.40 : 99,239.70 = 30,674.60 : x
  2. Step 2: Convert to fraction form
    66,217.40/99,239.70 = 30,674.60/x
  3. Step 3: Cross multiply
    66,217.40x = 99,239.70 × 30,674.60
  4. Step 4: Simplify right side
    66,217.40x = 3,044,138,101.62
  5. Step 5: Solve for x
    x = 3,044,138,101.62/66,217.40
  6. Step 6: Final answer
    x = 45,971.88

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1.5x scale

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.