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Finding the Fourth Proportional to 66,422.94, 91,629.02 and 42,182.40

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Solution

The fourth proportional to 66,422.94, 91,629.02 and 42,182.40 is: 58,189.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.94 : 91,629.02 = 42,182.40 : x
  2. Step 2: Convert to fraction form
    66,422.94/91,629.02 = 42,182.40/x
  3. Step 3: Cross multiply
    66,422.94x = 91,629.02 × 42,182.40
  4. Step 4: Simplify right side
    66,422.94x = 3,865,132,422.31
  5. Step 5: Solve for x
    x = 3,865,132,422.31/66,422.94
  6. Step 6: Final answer
    x = 58,189.73

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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.