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Finding the Fourth Proportional to 66,394.62, 99,416.16 and 54,759.78

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Solution

The fourth proportional to 66,394.62, 99,416.16 and 54,759.78 is: 81,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,394.62 : 99,416.16 = 54,759.78 : x
  2. Step 2: Convert to fraction form
    66,394.62/99,416.16 = 54,759.78/x
  3. Step 3: Cross multiply
    66,394.62x = 99,416.16 × 54,759.78
  4. Step 4: Simplify right side
    66,394.62x = 5,444,007,050.04
  5. Step 5: Solve for x
    x = 5,444,007,050.04/66,394.62
  6. Step 6: Final answer
    x = 81,994.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.