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Finding the Fourth Proportional to 66,639.36, 91,962.24 and 36,424.88

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Solution

The fourth proportional to 66,639.36, 91,962.24 and 36,424.88 is: 50,266.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.36 : 91,962.24 = 36,424.88 : x
  2. Step 2: Convert to fraction form
    66,639.36/91,962.24 = 36,424.88/x
  3. Step 3: Cross multiply
    66,639.36x = 91,962.24 × 36,424.88
  4. Step 4: Simplify right side
    66,639.36x = 3,349,713,556.53
  5. Step 5: Solve for x
    x = 3,349,713,556.53/66,639.36
  6. Step 6: Final answer
    x = 50,266.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.