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Finding the Fourth Proportional to 66,643.84, 91,970.97 and 36,431.21

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Solution

The fourth proportional to 66,643.84, 91,970.97 and 36,431.21 is: 50,276.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,643.84 : 91,970.97 = 36,431.21 : x
  2. Step 2: Convert to fraction form
    66,643.84/91,970.97 = 36,431.21/x
  3. Step 3: Cross multiply
    66,643.84x = 91,970.97 × 36,431.21
  4. Step 4: Simplify right side
    66,643.84x = 3,350,613,721.97
  5. Step 5: Solve for x
    x = 3,350,613,721.97/66,643.84
  6. Step 6: Final answer
    x = 50,276.42

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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.