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Finding the Fourth Proportional to 186,417.78, 279,105.64 and 100,721.62

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Solution

The fourth proportional to 186,417.78, 279,105.64 and 100,721.62 is: 150,800.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,417.78 : 279,105.64 = 100,721.62 : x
  2. Step 2: Convert to fraction form
    186,417.78/279,105.64 = 100,721.62/x
  3. Step 3: Cross multiply
    186,417.78x = 279,105.64 × 100,721.62
  4. Step 4: Simplify right side
    186,417.78x = 28,111,972,211.94
  5. Step 5: Solve for x
    x = 28,111,972,211.94/186,417.78
  6. Step 6: Final answer
    x = 150,800.92

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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.