Home / 212,612.70-318,919.05-123,966.30

Finding the Fourth Proportional to 212,612.70, 318,919.05 and 123,966.30

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Solution

The fourth proportional to 212,612.70, 318,919.05 and 123,966.30 is: 185,949.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,612.70 : 318,919.05 = 123,966.30 : x
  2. Step 2: Convert to fraction form
    212,612.70/318,919.05 = 123,966.30/x
  3. Step 3: Cross multiply
    212,612.70x = 318,919.05 × 123,966.30
  4. Step 4: Simplify right side
    212,612.70x = 39,535,214,628.02
  5. Step 5: Solve for x
    x = 39,535,214,628.02/212,612.70
  6. Step 6: Final answer
    x = 185,949.45

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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.