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Finding the Fourth Proportional to 72,592.74, 109,427.73 and 66,286.50

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Solution

The fourth proportional to 72,592.74, 109,427.73 and 66,286.50 is: 99,921.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,592.74 : 109,427.73 = 66,286.50 : x
  2. Step 2: Convert to fraction form
    72,592.74/109,427.73 = 66,286.50/x
  3. Step 3: Cross multiply
    72,592.74x = 109,427.73 × 66,286.50
  4. Step 4: Simplify right side
    72,592.74x = 7,253,581,181.25
  5. Step 5: Solve for x
    x = 7,253,581,181.25/72,592.74
  6. Step 6: Final answer
    x = 99,921.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.