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Finding the Fourth Proportional to 212,153.72, 318,232.40 and 54,383.54

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Solution

The fourth proportional to 212,153.72, 318,232.40 and 54,383.54 is: 81,575.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,153.72 : 318,232.40 = 54,383.54 : x
  2. Step 2: Convert to fraction form
    212,153.72/318,232.40 = 54,383.54/x
  3. Step 3: Cross multiply
    212,153.72x = 318,232.40 × 54,383.54
  4. Step 4: Simplify right side
    212,153.72x = 17,306,602,591.62
  5. Step 5: Solve for x
    x = 17,306,602,591.62/212,153.72
  6. Step 6: Final answer
    x = 81,575.77

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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.