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Finding the Fourth Proportional to 53,800.80, 80,662.80 and 30,434.40

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Solution

The fourth proportional to 53,800.80, 80,662.80 and 30,434.40 is: 45,629.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,800.80 : 80,662.80 = 30,434.40 : x
  2. Step 2: Convert to fraction form
    53,800.80/80,662.80 = 30,434.40/x
  3. Step 3: Cross multiply
    53,800.80x = 80,662.80 × 30,434.40
  4. Step 4: Simplify right side
    53,800.80x = 2,454,923,920.32
  5. Step 5: Solve for x
    x = 2,454,923,920.32/53,800.80
  6. Step 6: Final answer
    x = 45,629.88

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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.