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Finding the Fourth Proportional to 78,883.20, 118,195.20 and 67,219.20

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Solution

The fourth proportional to 78,883.20, 118,195.20 and 67,219.20 is: 100,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,883.20 : 118,195.20 = 67,219.20 : x
  2. Step 2: Convert to fraction form
    78,883.20/118,195.20 = 67,219.20/x
  3. Step 3: Cross multiply
    78,883.20x = 118,195.20 × 67,219.20
  4. Step 4: Simplify right side
    78,883.20x = 7,944,986,787.84
  5. Step 5: Solve for x
    x = 7,944,986,787.84/78,883.20
  6. Step 6: Final answer
    x = 100,718.36

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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.