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Finding the Fourth Proportional to 89,388.80, 134,083.20 and 65,769.20

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Solution

The fourth proportional to 89,388.80, 134,083.20 and 65,769.20 is: 98,653.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,388.80 : 134,083.20 = 65,769.20 : x
  2. Step 2: Convert to fraction form
    89,388.80/134,083.20 = 65,769.20/x
  3. Step 3: Cross multiply
    89,388.80x = 134,083.20 × 65,769.20
  4. Step 4: Simplify right side
    89,388.80x = 8,818,544,797.44
  5. Step 5: Solve for x
    x = 8,818,544,797.44/89,388.80
  6. Step 6: Final answer
    x = 98,653.80

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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.