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Finding the Fourth Proportional to 66,121.88, 91,202.91 and 42,237.95

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Solution

The fourth proportional to 66,121.88, 91,202.91 and 42,237.95 is: 58,259.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,121.88 : 91,202.91 = 42,237.95 : x
  2. Step 2: Convert to fraction form
    66,121.88/91,202.91 = 42,237.95/x
  3. Step 3: Cross multiply
    66,121.88x = 91,202.91 × 42,237.95
  4. Step 4: Simplify right side
    66,121.88x = 3,852,223,952.43
  5. Step 5: Solve for x
    x = 3,852,223,952.43/66,121.88
  6. Step 6: Final answer
    x = 58,259.44

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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.