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Finding the Fourth Proportional to 61,190.76, 91,767.78 and 21,742.68

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Solution

The fourth proportional to 61,190.76, 91,767.78 and 21,742.68 is: 32,607.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,190.76 : 91,767.78 = 21,742.68 : x
  2. Step 2: Convert to fraction form
    61,190.76/91,767.78 = 21,742.68/x
  3. Step 3: Cross multiply
    61,190.76x = 91,767.78 × 21,742.68
  4. Step 4: Simplify right side
    61,190.76x = 1,995,277,474.85
  5. Step 5: Solve for x
    x = 1,995,277,474.85/61,190.76
  6. Step 6: Final answer
    x = 32,607.50

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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.