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Finding the Fourth Proportional to 80,530.92, 120,254.07 and 65,769.12

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Solution

The fourth proportional to 80,530.92, 120,254.07 and 65,769.12 is: 98,210.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,530.92 : 120,254.07 = 65,769.12 : x
  2. Step 2: Convert to fraction form
    80,530.92/120,254.07 = 65,769.12/x
  3. Step 3: Cross multiply
    80,530.92x = 120,254.07 × 65,769.12
  4. Step 4: Simplify right side
    80,530.92x = 7,909,004,360.32
  5. Step 5: Solve for x
    x = 7,909,004,360.32/80,530.92
  6. Step 6: Final answer
    x = 98,210.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.