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Finding the Fourth Proportional to 66,418.74, 91,657.94 and 36,203.45

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Solution

The fourth proportional to 66,418.74, 91,657.94 and 36,203.45 is: 49,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.74 : 91,657.94 = 36,203.45 : x
  2. Step 2: Convert to fraction form
    66,418.74/91,657.94 = 36,203.45/x
  3. Step 3: Cross multiply
    66,418.74x = 91,657.94 × 36,203.45
  4. Step 4: Simplify right side
    66,418.74x = 3,318,333,008.59
  5. Step 5: Solve for x
    x = 3,318,333,008.59/66,418.74
  6. Step 6: Final answer
    x = 49,960.79

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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.