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Finding the Fourth Proportional to 72,736.84, 109,105.25 and 20,146.32

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Solution

The fourth proportional to 72,736.84, 109,105.25 and 20,146.32 is: 30,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,736.84 : 109,105.25 = 20,146.32 : x
  2. Step 2: Convert to fraction form
    72,736.84/109,105.25 = 20,146.32/x
  3. Step 3: Cross multiply
    72,736.84x = 109,105.25 × 20,146.32
  4. Step 4: Simplify right side
    72,736.84x = 2,198,069,280.18
  5. Step 5: Solve for x
    x = 2,198,069,280.18/72,736.84
  6. Step 6: Final answer
    x = 30,219.48

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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.