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Finding the Fourth Proportional to 54,161.70, 81,242.55 and 38,415.30

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Solution

The fourth proportional to 54,161.70, 81,242.55 and 38,415.30 is: 57,622.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,161.70 : 81,242.55 = 38,415.30 : x
  2. Step 2: Convert to fraction form
    54,161.70/81,242.55 = 38,415.30/x
  3. Step 3: Cross multiply
    54,161.70x = 81,242.55 × 38,415.30
  4. Step 4: Simplify right side
    54,161.70x = 3,120,956,931.02
  5. Step 5: Solve for x
    x = 3,120,956,931.02/54,161.70
  6. Step 6: Final answer
    x = 57,622.95

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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.