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Finding the Fourth Proportional to 67,280.40, 100,920.60 and 56,912.40

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Solution

The fourth proportional to 67,280.40, 100,920.60 and 56,912.40 is: 85,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,280.40 : 100,920.60 = 56,912.40 : x
  2. Step 2: Convert to fraction form
    67,280.40/100,920.60 = 56,912.40/x
  3. Step 3: Cross multiply
    67,280.40x = 100,920.60 × 56,912.40
  4. Step 4: Simplify right side
    67,280.40x = 5,743,633,555.44
  5. Step 5: Solve for x
    x = 5,743,633,555.44/67,280.40
  6. Step 6: Final answer
    x = 85,368.60

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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.