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Finding the Fourth Proportional to 91,003.70, 125,662.65 and 57,069.26

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Solution

The fourth proportional to 91,003.70, 125,662.65 and 57,069.26 is: 78,804.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,003.70 : 125,662.65 = 57,069.26 : x
  2. Step 2: Convert to fraction form
    91,003.70/125,662.65 = 57,069.26/x
  3. Step 3: Cross multiply
    91,003.70x = 125,662.65 × 57,069.26
  4. Step 4: Simplify right side
    91,003.70x = 7,171,474,445.14
  5. Step 5: Solve for x
    x = 7,171,474,445.14/91,003.70
  6. Step 6: Final answer
    x = 78,804.21

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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.