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Finding the Fourth Proportional to 299,626.20, 449,439.30 and 78,010.20

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Solution

The fourth proportional to 299,626.20, 449,439.30 and 78,010.20 is: 117,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,626.20 : 449,439.30 = 78,010.20 : x
  2. Step 2: Convert to fraction form
    299,626.20/449,439.30 = 78,010.20/x
  3. Step 3: Cross multiply
    299,626.20x = 449,439.30 × 78,010.20
  4. Step 4: Simplify right side
    299,626.20x = 35,060,849,680.86
  5. Step 5: Solve for x
    x = 35,060,849,680.86/299,626.20
  6. Step 6: Final answer
    x = 117,015.30

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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.