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Finding the Fourth Proportional to 158,476.78, 218,665.64 and 93,917.56

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Solution

The fourth proportional to 158,476.78, 218,665.64 and 93,917.56 is: 129,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,476.78 : 218,665.64 = 93,917.56 : x
  2. Step 2: Convert to fraction form
    158,476.78/218,665.64 = 93,917.56/x
  3. Step 3: Cross multiply
    158,476.78x = 218,665.64 × 93,917.56
  4. Step 4: Simplify right side
    158,476.78x = 20,536,543,989.05
  5. Step 5: Solve for x
    x = 20,536,543,989.05/158,476.78
  6. Step 6: Final answer
    x = 129,587.09

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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.