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Finding the Fourth Proportional to 66,398.72, 91,629.40 and 36,185.36

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Solution

The fourth proportional to 66,398.72, 91,629.40 and 36,185.36 is: 49,935.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,398.72 : 91,629.40 = 36,185.36 : x
  2. Step 2: Convert to fraction form
    66,398.72/91,629.40 = 36,185.36/x
  3. Step 3: Cross multiply
    66,398.72x = 91,629.40 × 36,185.36
  4. Step 4: Simplify right side
    66,398.72x = 3,315,642,825.58
  5. Step 5: Solve for x
    x = 3,315,642,825.58/66,398.72
  6. Step 6: Final answer
    x = 49,935.34

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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.