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Finding the Fourth Proportional to 207,612.40, 311,418.60 and 67,385.20

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Solution

The fourth proportional to 207,612.40, 311,418.60 and 67,385.20 is: 101,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,612.40 : 311,418.60 = 67,385.20 : x
  2. Step 2: Convert to fraction form
    207,612.40/311,418.60 = 67,385.20/x
  3. Step 3: Cross multiply
    207,612.40x = 311,418.60 × 67,385.20
  4. Step 4: Simplify right side
    207,612.40x = 20,985,004,644.72
  5. Step 5: Solve for x
    x = 20,985,004,644.72/207,612.40
  6. Step 6: Final answer
    x = 101,077.80

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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.