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Finding the Fourth Proportional to 91,317.73, 126,098.64 and 57,385

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Solution

The fourth proportional to 91,317.73, 126,098.64 and 57,385 is: 79,241.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,317.73 : 126,098.64 = 57,385 : x
  2. Step 2: Convert to fraction form
    91,317.73/126,098.64 = 57,385/x
  3. Step 3: Cross multiply
    91,317.73x = 126,098.64 × 57,385
  4. Step 4: Simplify right side
    91,317.73x = 7,236,170,456.40
  5. Step 5: Solve for x
    x = 7,236,170,456.40/91,317.73
  6. Step 6: Final answer
    x = 79,241.68

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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.