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Finding the Fourth Proportional to 66,551.62, 91,808.08 and 39,675.19

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Solution

The fourth proportional to 66,551.62, 91,808.08 and 39,675.19 is: 54,732.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,551.62 : 91,808.08 = 39,675.19 : x
  2. Step 2: Convert to fraction form
    66,551.62/91,808.08 = 39,675.19/x
  3. Step 3: Cross multiply
    66,551.62x = 91,808.08 × 39,675.19
  4. Step 4: Simplify right side
    66,551.62x = 3,642,503,017.54
  5. Step 5: Solve for x
    x = 3,642,503,017.54/66,551.62
  6. Step 6: Final answer
    x = 54,732.00

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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.