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Finding the Fourth Proportional to 66,908, 100,400.88 and 29,972

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Solution

The fourth proportional to 66,908, 100,400.88 and 29,972 is: 44,975.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,908 : 100,400.88 = 29,972 : x
  2. Step 2: Convert to fraction form
    66,908/100,400.88 = 29,972/x
  3. Step 3: Cross multiply
    66,908x = 100,400.88 × 29,972
  4. Step 4: Simplify right side
    66,908x = 3,009,215,175.36
  5. Step 5: Solve for x
    x = 3,009,215,175.36/66,908
  6. Step 6: Final answer
    x = 44,975.42

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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.