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Finding the Fourth Proportional to 81,174.95, 121,773.86 and 25,019.60

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Solution

The fourth proportional to 81,174.95, 121,773.86 and 25,019.60 is: 37,532.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,174.95 : 121,773.86 = 25,019.60 : x
  2. Step 2: Convert to fraction form
    81,174.95/121,773.86 = 25,019.60/x
  3. Step 3: Cross multiply
    81,174.95x = 121,773.86 × 25,019.60
  4. Step 4: Simplify right side
    81,174.95x = 3,046,732,533.69
  5. Step 5: Solve for x
    x = 3,046,732,533.69/81,174.95
  6. Step 6: Final answer
    x = 37,532.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.