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Finding the Fourth Proportional to 66,171.84, 99,245.52 and 30,139.80

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Solution

The fourth proportional to 66,171.84, 99,245.52 and 30,139.80 is: 45,204.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,171.84 : 99,245.52 = 30,139.80 : x
  2. Step 2: Convert to fraction form
    66,171.84/99,245.52 = 30,139.80/x
  3. Step 3: Cross multiply
    66,171.84x = 99,245.52 × 30,139.80
  4. Step 4: Simplify right side
    66,171.84x = 2,991,240,123.70
  5. Step 5: Solve for x
    x = 2,991,240,123.70/66,171.84
  6. Step 6: Final answer
    x = 45,204.12

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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.