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Finding the Fourth Proportional to 54,287.70, 81,431.55 and 34,653.30

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Solution

The fourth proportional to 54,287.70, 81,431.55 and 34,653.30 is: 51,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,287.70 : 81,431.55 = 34,653.30 : x
  2. Step 2: Convert to fraction form
    54,287.70/81,431.55 = 34,653.30/x
  3. Step 3: Cross multiply
    54,287.70x = 81,431.55 × 34,653.30
  4. Step 4: Simplify right side
    54,287.70x = 2,821,871,931.62
  5. Step 5: Solve for x
    x = 2,821,871,931.62/54,287.70
  6. Step 6: Final answer
    x = 51,979.95

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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.