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Finding the Fourth Proportional to 76,665.25, 114,997.88 and 21,261.25

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Solution

The fourth proportional to 76,665.25, 114,997.88 and 21,261.25 is: 31,891.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,665.25 : 114,997.88 = 21,261.25 : x
  2. Step 2: Convert to fraction form
    76,665.25/114,997.88 = 21,261.25/x
  3. Step 3: Cross multiply
    76,665.25x = 114,997.88 × 21,261.25
  4. Step 4: Simplify right side
    76,665.25x = 2,444,998,569.84
  5. Step 5: Solve for x
    x = 2,444,998,569.84/76,665.25
  6. Step 6: Final answer
    x = 31,891.88

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1.5x scale

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.