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Finding the Fourth Proportional to 61,286.20, 84,584.80 and 57,283.99

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Solution

The fourth proportional to 61,286.20, 84,584.80 and 57,283.99 is: 79,061.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,286.20 : 84,584.80 = 57,283.99 : x
  2. Step 2: Convert to fraction form
    61,286.20/84,584.80 = 57,283.99/x
  3. Step 3: Cross multiply
    61,286.20x = 84,584.80 × 57,283.99
  4. Step 4: Simplify right side
    61,286.20x = 4,845,354,694.14
  5. Step 5: Solve for x
    x = 4,845,354,694.14/61,286.20
  6. Step 6: Final answer
    x = 79,061.11

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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.