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Finding the Fourth Proportional to 91,357.70, 126,066.66 and 55,542.74

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Solution

The fourth proportional to 91,357.70, 126,066.66 and 55,542.74 is: 76,644.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,357.70 : 126,066.66 = 55,542.74 : x
  2. Step 2: Convert to fraction form
    91,357.70/126,066.66 = 55,542.74/x
  3. Step 3: Cross multiply
    91,357.70x = 126,066.66 × 55,542.74
  4. Step 4: Simplify right side
    91,357.70x = 7,002,087,719.05
  5. Step 5: Solve for x
    x = 7,002,087,719.05/91,357.70
  6. Step 6: Final answer
    x = 76,644.75

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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.