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Finding the Fourth Proportional to 54,582, 81,872.99 and 15,139.12

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Solution

The fourth proportional to 54,582, 81,872.99 and 15,139.12 is: 22,708.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,582 : 81,872.99 = 15,139.12 : x
  2. Step 2: Convert to fraction form
    54,582/81,872.99 = 15,139.12/x
  3. Step 3: Cross multiply
    54,582x = 81,872.99 × 15,139.12
  4. Step 4: Simplify right side
    54,582x = 1,239,484,739.99
  5. Step 5: Solve for x
    x = 1,239,484,739.99/54,582
  6. Step 6: Final answer
    x = 22,708.67

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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.