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Finding the Fourth Proportional to 212,687.75, 319,032.84 and 54,905.42

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Solution

The fourth proportional to 212,687.75, 319,032.84 and 54,905.42 is: 82,358.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,687.75 : 319,032.84 = 54,905.42 : x
  2. Step 2: Convert to fraction form
    212,687.75/319,032.84 = 54,905.42/x
  3. Step 3: Cross multiply
    212,687.75x = 319,032.84 × 54,905.42
  4. Step 4: Simplify right side
    212,687.75x = 17,516,632,073.99
  5. Step 5: Solve for x
    x = 17,516,632,073.99/212,687.75
  6. Step 6: Final answer
    x = 82,358.44

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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.