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Finding the Fourth Proportional to 72,923.80, 109,372.20 and 20,322.40

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Solution

The fourth proportional to 72,923.80, 109,372.20 and 20,322.40 is: 30,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,923.80 : 109,372.20 = 20,322.40 : x
  2. Step 2: Convert to fraction form
    72,923.80/109,372.20 = 20,322.40/x
  3. Step 3: Cross multiply
    72,923.80x = 109,372.20 × 20,322.40
  4. Step 4: Simplify right side
    72,923.80x = 2,222,705,597.28
  5. Step 5: Solve for x
    x = 2,222,705,597.28/72,923.80
  6. Step 6: Final answer
    x = 30,479.84

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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.