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Finding the Fourth Proportional to 54,640.44, 81,981.18 and 28,328.76

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Solution

The fourth proportional to 54,640.44, 81,981.18 and 28,328.76 is: 42,503.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,640.44 : 81,981.18 = 28,328.76 : x
  2. Step 2: Convert to fraction form
    54,640.44/81,981.18 = 28,328.76/x
  3. Step 3: Cross multiply
    54,640.44x = 81,981.18 × 28,328.76
  4. Step 4: Simplify right side
    54,640.44x = 2,322,425,172.74
  5. Step 5: Solve for x
    x = 2,322,425,172.74/54,640.44
  6. Step 6: Final answer
    x = 42,503.78

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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.