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Finding the Fourth Proportional to 98,719.20, 148,078.80 and 67,226.40

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Solution

The fourth proportional to 98,719.20, 148,078.80 and 67,226.40 is: 100,839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,719.20 : 148,078.80 = 67,226.40 : x
  2. Step 2: Convert to fraction form
    98,719.20/148,078.80 = 67,226.40/x
  3. Step 3: Cross multiply
    98,719.20x = 148,078.80 × 67,226.40
  4. Step 4: Simplify right side
    98,719.20x = 9,954,804,640.32
  5. Step 5: Solve for x
    x = 9,954,804,640.32/98,719.20
  6. Step 6: Final answer
    x = 100,839.60

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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.