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Finding the Fourth Proportional to 72,960.80, 109,441.20 and 49,632.80

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Solution

The fourth proportional to 72,960.80, 109,441.20 and 49,632.80 is: 74,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,960.80 : 109,441.20 = 49,632.80 : x
  2. Step 2: Convert to fraction form
    72,960.80/109,441.20 = 49,632.80/x
  3. Step 3: Cross multiply
    72,960.80x = 109,441.20 × 49,632.80
  4. Step 4: Simplify right side
    72,960.80x = 5,431,873,191.36
  5. Step 5: Solve for x
    x = 5,431,873,191.36/72,960.80
  6. Step 6: Final answer
    x = 74,449.20

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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.