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Finding the Fourth Proportional to 80,809.28, 121,048.66 and 65,869.64

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Solution

The fourth proportional to 80,809.28, 121,048.66 and 65,869.64 is: 98,669.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,809.28 : 121,048.66 = 65,869.64 : x
  2. Step 2: Convert to fraction form
    80,809.28/121,048.66 = 65,869.64/x
  3. Step 3: Cross multiply
    80,809.28x = 121,048.66 × 65,869.64
  4. Step 4: Simplify right side
    80,809.28x = 7,973,431,656.68
  5. Step 5: Solve for x
    x = 7,973,431,656.68/80,809.28
  6. Step 6: Final answer
    x = 98,669.75

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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.