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Finding the Fourth Proportional to 66,092.81, 91,169.90 and 42,192.55

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Solution

The fourth proportional to 66,092.81, 91,169.90 and 42,192.55 is: 58,201.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,092.81 : 91,169.90 = 42,192.55 : x
  2. Step 2: Convert to fraction form
    66,092.81/91,169.90 = 42,192.55/x
  3. Step 3: Cross multiply
    66,092.81x = 91,169.90 × 42,192.55
  4. Step 4: Simplify right side
    66,092.81x = 3,846,690,108.40
  5. Step 5: Solve for x
    x = 3,846,690,108.40/66,092.81
  6. Step 6: Final answer
    x = 58,201.34

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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.