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Finding the Fourth Proportional to 66,654.36, 91,980.36 and 39,801.24

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Solution

The fourth proportional to 66,654.36, 91,980.36 and 39,801.24 is: 54,924.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,654.36 : 91,980.36 = 39,801.24 : x
  2. Step 2: Convert to fraction form
    66,654.36/91,980.36 = 39,801.24/x
  3. Step 3: Cross multiply
    66,654.36x = 91,980.36 × 39,801.24
  4. Step 4: Simplify right side
    66,654.36x = 3,660,932,383.65
  5. Step 5: Solve for x
    x = 3,660,932,383.65/66,654.36
  6. Step 6: Final answer
    x = 54,924.12

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1.5x scale

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.