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Finding the Fourth Proportional to 66,240, 99,388.80 and 32,993.28

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Solution

The fourth proportional to 66,240, 99,388.80 and 32,993.28 is: 49,504.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,240 : 99,388.80 = 32,993.28 : x
  2. Step 2: Convert to fraction form
    66,240/99,388.80 = 32,993.28/x
  3. Step 3: Cross multiply
    66,240x = 99,388.80 × 32,993.28
  4. Step 4: Simplify right side
    66,240x = 3,279,162,507.26
  5. Step 5: Solve for x
    x = 3,279,162,507.26/66,240
  6. Step 6: Final answer
    x = 49,504.26

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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.