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Finding the Fourth Proportional to 162,917.20, 244,266.45 and 78,717.70

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Solution

The fourth proportional to 162,917.20, 244,266.45 and 78,717.70 is: 118,023.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,917.20 : 244,266.45 = 78,717.70 : x
  2. Step 2: Convert to fraction form
    162,917.20/244,266.45 = 78,717.70/x
  3. Step 3: Cross multiply
    162,917.20x = 244,266.45 × 78,717.70
  4. Step 4: Simplify right side
    162,917.20x = 19,228,093,131.17
  5. Step 5: Solve for x
    x = 19,228,093,131.17/162,917.20
  6. Step 6: Final answer
    x = 118,023.71

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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.