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Finding the Fourth Proportional to 66,642.35, 91,968.90 and 36,429.69

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Solution

The fourth proportional to 66,642.35, 91,968.90 and 36,429.69 is: 50,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.35 : 91,968.90 = 36,429.69 : x
  2. Step 2: Convert to fraction form
    66,642.35/91,968.90 = 36,429.69/x
  3. Step 3: Cross multiply
    66,642.35x = 91,968.90 × 36,429.69
  4. Step 4: Simplify right side
    66,642.35x = 3,350,398,516.64
  5. Step 5: Solve for x
    x = 3,350,398,516.64/66,642.35
  6. Step 6: Final answer
    x = 50,274.32

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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.