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Finding the Fourth Proportional to 207,434.40, 311,151.60 and 67,207.20

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Solution

The fourth proportional to 207,434.40, 311,151.60 and 67,207.20 is: 100,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,434.40 : 311,151.60 = 67,207.20 : x
  2. Step 2: Convert to fraction form
    207,434.40/311,151.60 = 67,207.20/x
  3. Step 3: Cross multiply
    207,434.40x = 311,151.60 × 67,207.20
  4. Step 4: Simplify right side
    207,434.40x = 20,911,627,811.52
  5. Step 5: Solve for x
    x = 20,911,627,811.52/207,434.40
  6. Step 6: Final answer
    x = 100,810.80

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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.