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Finding the Fourth Proportional to 91,901.90, 126,809.71 and 57,442.56

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Solution

The fourth proportional to 91,901.90, 126,809.71 and 57,442.56 is: 79,261.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,901.90 : 126,809.71 = 57,442.56 : x
  2. Step 2: Convert to fraction form
    91,901.90/126,809.71 = 57,442.56/x
  3. Step 3: Cross multiply
    91,901.90x = 126,809.71 × 57,442.56
  4. Step 4: Simplify right side
    91,901.90x = 7,284,274,375.26
  5. Step 5: Solve for x
    x = 7,284,274,375.26/91,901.90
  6. Step 6: Final answer
    x = 79,261.41

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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.