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Finding the Fourth Proportional to 157,940.82, 217,957.81 and 86,320.82

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Solution

The fourth proportional to 157,940.82, 217,957.81 and 86,320.82 is: 119,122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,940.82 : 217,957.81 = 86,320.82 : x
  2. Step 2: Convert to fraction form
    157,940.82/217,957.81 = 86,320.82/x
  3. Step 3: Cross multiply
    157,940.82x = 217,957.81 × 86,320.82
  4. Step 4: Simplify right side
    157,940.82x = 18,814,296,453.00
  5. Step 5: Solve for x
    x = 18,814,296,453.00/157,940.82
  6. Step 6: Final answer
    x = 119,122.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.