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Finding the Fourth Proportional to 71,632.80, 107,449.20 and 19,047.60

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Solution

The fourth proportional to 71,632.80, 107,449.20 and 19,047.60 is: 28,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,632.80 : 107,449.20 = 19,047.60 : x
  2. Step 2: Convert to fraction form
    71,632.80/107,449.20 = 19,047.60/x
  3. Step 3: Cross multiply
    71,632.80x = 107,449.20 × 19,047.60
  4. Step 4: Simplify right side
    71,632.80x = 2,046,649,381.92
  5. Step 5: Solve for x
    x = 2,046,649,381.92/71,632.80
  6. Step 6: Final answer
    x = 28,571.40

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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.