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Finding the Fourth Proportional to 66,643.21, 91,967.62 and 36,428.65

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Solution

The fourth proportional to 66,643.21, 91,967.62 and 36,428.65 is: 50,271.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,643.21 : 91,967.62 = 36,428.65 : x
  2. Step 2: Convert to fraction form
    66,643.21/91,967.62 = 36,428.65/x
  3. Step 3: Cross multiply
    66,643.21x = 91,967.62 × 36,428.65
  4. Step 4: Simplify right side
    66,643.21x = 3,350,256,149.24
  5. Step 5: Solve for x
    x = 3,350,256,149.24/66,643.21
  6. Step 6: Final answer
    x = 50,271.53

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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.