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Finding the Fourth Proportional to 66,488.40, 99,721.50 and 22,119.84

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Solution

The fourth proportional to 66,488.40, 99,721.50 and 22,119.84 is: 33,176.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.40 : 99,721.50 = 22,119.84 : x
  2. Step 2: Convert to fraction form
    66,488.40/99,721.50 = 22,119.84/x
  3. Step 3: Cross multiply
    66,488.40x = 99,721.50 × 22,119.84
  4. Step 4: Simplify right side
    66,488.40x = 2,205,823,624.56
  5. Step 5: Solve for x
    x = 2,205,823,624.56/66,488.40
  6. Step 6: Final answer
    x = 33,176.07

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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.