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Finding the Fourth Proportional to 66,488.40, 99,649.44 and 33,217.79

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Solution

The fourth proportional to 66,488.40, 99,649.44 and 33,217.79 is: 49,785.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.40 : 99,649.44 = 33,217.79 : x
  2. Step 2: Convert to fraction form
    66,488.40/99,649.44 = 33,217.79/x
  3. Step 3: Cross multiply
    66,488.40x = 99,649.44 × 33,217.79
  4. Step 4: Simplify right side
    66,488.40x = 3,310,133,673.29
  5. Step 5: Solve for x
    x = 3,310,133,673.29/66,488.40
  6. Step 6: Final answer
    x = 49,785.13

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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.