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Finding the Fourth Proportional to 212,409.96, 318,614.88 and 87,754.20

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Solution

The fourth proportional to 212,409.96, 318,614.88 and 87,754.20 is: 131,631.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,409.96 : 318,614.88 = 87,754.20 : x
  2. Step 2: Convert to fraction form
    212,409.96/318,614.88 = 87,754.20/x
  3. Step 3: Cross multiply
    212,409.96x = 318,614.88 × 87,754.20
  4. Step 4: Simplify right side
    212,409.96x = 27,959,793,902.50
  5. Step 5: Solve for x
    x = 27,959,793,902.50/212,409.96
  6. Step 6: Final answer
    x = 131,631.28

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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.