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Finding the Fourth Proportional to 75,475.20, 113,212.80 and 67,310.40

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Solution

The fourth proportional to 75,475.20, 113,212.80 and 67,310.40 is: 100,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,475.20 : 113,212.80 = 67,310.40 : x
  2. Step 2: Convert to fraction form
    75,475.20/113,212.80 = 67,310.40/x
  3. Step 3: Cross multiply
    75,475.20x = 113,212.80 × 67,310.40
  4. Step 4: Simplify right side
    75,475.20x = 7,620,398,853.12
  5. Step 5: Solve for x
    x = 7,620,398,853.12/75,475.20
  6. Step 6: Final answer
    x = 100,965.60

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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.