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Finding the Fourth Proportional to 72,416.38, 100,071.84 and 54,480.28

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Solution

The fourth proportional to 72,416.38, 100,071.84 and 54,480.28 is: 75,286.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,416.38 : 100,071.84 = 54,480.28 : x
  2. Step 2: Convert to fraction form
    72,416.38/100,071.84 = 54,480.28/x
  3. Step 3: Cross multiply
    72,416.38x = 100,071.84 × 54,480.28
  4. Step 4: Simplify right side
    72,416.38x = 5,451,941,863.32
  5. Step 5: Solve for x
    x = 5,451,941,863.32/72,416.38
  6. Step 6: Final answer
    x = 75,286.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.