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Finding the Fourth Proportional to 54,018.40, 81,051.90 and 18,983.20

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Solution

The fourth proportional to 54,018.40, 81,051.90 and 18,983.20 is: 28,483.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,018.40 : 81,051.90 = 18,983.20 : x
  2. Step 2: Convert to fraction form
    54,018.40/81,051.90 = 18,983.20/x
  3. Step 3: Cross multiply
    54,018.40x = 81,051.90 × 18,983.20
  4. Step 4: Simplify right side
    54,018.40x = 1,538,624,428.08
  5. Step 5: Solve for x
    x = 1,538,624,428.08/54,018.40
  6. Step 6: Final answer
    x = 28,483.34

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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.