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Finding the Fourth Proportional to 198,387.78, 273,616.86 and 130,474.48

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Solution

The fourth proportional to 198,387.78, 273,616.86 and 130,474.48 is: 179,950.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,387.78 : 273,616.86 = 130,474.48 : x
  2. Step 2: Convert to fraction form
    198,387.78/273,616.86 = 130,474.48/x
  3. Step 3: Cross multiply
    198,387.78x = 273,616.86 × 130,474.48
  4. Step 4: Simplify right side
    198,387.78x = 35,700,018,633.36
  5. Step 5: Solve for x
    x = 35,700,018,633.36/198,387.78
  6. Step 6: Final answer
    x = 179,950.69

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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.