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Finding the Fourth Proportional to 66,287.37, 91,478.49 and 36,074.64

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Solution

The fourth proportional to 66,287.37, 91,478.49 and 36,074.64 is: 49,784.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.37 : 91,478.49 = 36,074.64 : x
  2. Step 2: Convert to fraction form
    66,287.37/91,478.49 = 36,074.64/x
  3. Step 3: Cross multiply
    66,287.37x = 91,478.49 × 36,074.64
  4. Step 4: Simplify right side
    66,287.37x = 3,300,053,594.49
  5. Step 5: Solve for x
    x = 3,300,053,594.49/66,287.37
  6. Step 6: Final answer
    x = 49,784.05

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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.