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Finding the Fourth Proportional to 66,200, 91,434 and 43,805.12

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Solution

The fourth proportional to 66,200, 91,434 and 43,805.12 is: 60,502.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,200 : 91,434 = 43,805.12 : x
  2. Step 2: Convert to fraction form
    66,200/91,434 = 43,805.12/x
  3. Step 3: Cross multiply
    66,200x = 91,434 × 43,805.12
  4. Step 4: Simplify right side
    66,200x = 4,005,277,342.08
  5. Step 5: Solve for x
    x = 4,005,277,342.08/66,200
  6. Step 6: Final answer
    x = 60,502.68

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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.