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Finding the Fourth Proportional to 61,207.40, 91,828.25 and 21,768.50

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Solution

The fourth proportional to 61,207.40, 91,828.25 and 21,768.50 is: 32,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,207.40 : 91,828.25 = 21,768.50 : x
  2. Step 2: Convert to fraction form
    61,207.40/91,828.25 = 21,768.50/x
  3. Step 3: Cross multiply
    61,207.40x = 91,828.25 × 21,768.50
  4. Step 4: Simplify right side
    61,207.40x = 1,998,963,462.49
  5. Step 5: Solve for x
    x = 1,998,963,462.49/61,207.40
  6. Step 6: Final answer
    x = 32,658.85

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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.