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Finding the Fourth Proportional to 66,638.91, 91,952.82 and 42,797.88

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Solution

The fourth proportional to 66,638.91, 91,952.82 and 42,797.88 is: 59,055.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.91 : 91,952.82 = 42,797.88 : x
  2. Step 2: Convert to fraction form
    66,638.91/91,952.82 = 42,797.88/x
  3. Step 3: Cross multiply
    66,638.91x = 91,952.82 × 42,797.88
  4. Step 4: Simplify right side
    66,638.91x = 3,935,385,756.02
  5. Step 5: Solve for x
    x = 3,935,385,756.02/66,638.91
  6. Step 6: Final answer
    x = 59,055.37

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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.