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Finding the Fourth Proportional to 54,272.60, 81,384.60 and 20,981.60

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Solution

The fourth proportional to 54,272.60, 81,384.60 and 20,981.60 is: 31,463.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,272.60 : 81,384.60 = 20,981.60 : x
  2. Step 2: Convert to fraction form
    54,272.60/81,384.60 = 20,981.60/x
  3. Step 3: Cross multiply
    54,272.60x = 81,384.60 × 20,981.60
  4. Step 4: Simplify right side
    54,272.60x = 1,707,579,123.36
  5. Step 5: Solve for x
    x = 1,707,579,123.36/54,272.60
  6. Step 6: Final answer
    x = 31,463.01

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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.