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Finding the Fourth Proportional to 91,607.81, 126,418.85 and 55,797.89

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Solution

The fourth proportional to 91,607.81, 126,418.85 and 55,797.89 is: 77,001.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,607.81 : 126,418.85 = 55,797.89 : x
  2. Step 2: Convert to fraction form
    91,607.81/126,418.85 = 55,797.89/x
  3. Step 3: Cross multiply
    91,607.81x = 126,418.85 × 55,797.89
  4. Step 4: Simplify right side
    91,607.81x = 7,053,904,896.87
  5. Step 5: Solve for x
    x = 7,053,904,896.87/91,607.81
  6. Step 6: Final answer
    x = 77,001.13

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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.