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Finding the Fourth Proportional to 66,581.69, 99,872.91 and 22,208.32

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Solution

The fourth proportional to 66,581.69, 99,872.91 and 22,208.32 is: 33,312.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,581.69 : 99,872.91 = 22,208.32 : x
  2. Step 2: Convert to fraction form
    66,581.69/99,872.91 = 22,208.32/x
  3. Step 3: Cross multiply
    66,581.69x = 99,872.91 × 22,208.32
  4. Step 4: Simplify right side
    66,581.69x = 2,218,009,544.61
  5. Step 5: Solve for x
    x = 2,218,009,544.61/66,581.69
  6. Step 6: Final answer
    x = 33,312.61

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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.