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Finding the Fourth Proportional to 180,399.78, 248,787.20 and 154,898.15

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Solution

The fourth proportional to 180,399.78, 248,787.20 and 154,898.15 is: 213,618.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,399.78 : 248,787.20 = 154,898.15 : x
  2. Step 2: Convert to fraction form
    180,399.78/248,787.20 = 154,898.15/x
  3. Step 3: Cross multiply
    180,399.78x = 248,787.20 × 154,898.15
  4. Step 4: Simplify right side
    180,399.78x = 38,536,675,005.25
  5. Step 5: Solve for x
    x = 38,536,675,005.25/180,399.78
  6. Step 6: Final answer
    x = 213,618.19

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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.