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Finding the Fourth Proportional to 66,092, 91,165.38 and 39,215.44

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Solution

The fourth proportional to 66,092, 91,165.38 and 39,215.44 is: 54,092.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,092 : 91,165.38 = 39,215.44 : x
  2. Step 2: Convert to fraction form
    66,092/91,165.38 = 39,215.44/x
  3. Step 3: Cross multiply
    66,092x = 91,165.38 × 39,215.44
  4. Step 4: Simplify right side
    66,092x = 3,575,090,489.47
  5. Step 5: Solve for x
    x = 3,575,090,489.47/66,092
  6. Step 6: Final answer
    x = 54,092.64

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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.