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Finding the Fourth Proportional to 155,471.82, 214,606.52 and 91,809.87

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Solution

The fourth proportional to 155,471.82, 214,606.52 and 91,809.87 is: 126,730.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,471.82 : 214,606.52 = 91,809.87 : x
  2. Step 2: Convert to fraction form
    155,471.82/214,606.52 = 91,809.87/x
  3. Step 3: Cross multiply
    155,471.82x = 214,606.52 × 91,809.87
  4. Step 4: Simplify right side
    155,471.82x = 19,702,996,243.30
  5. Step 5: Solve for x
    x = 19,702,996,243.30/155,471.82
  6. Step 6: Final answer
    x = 126,730.34

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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.