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Finding the Fourth Proportional to 179,908.40, 269,689.80 and 139,905.20

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Solution

The fourth proportional to 179,908.40, 269,689.80 and 139,905.20 is: 209,723.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,908.40 : 269,689.80 = 139,905.20 : x
  2. Step 2: Convert to fraction form
    179,908.40/269,689.80 = 139,905.20/x
  3. Step 3: Cross multiply
    179,908.40x = 269,689.80 × 139,905.20
  4. Step 4: Simplify right side
    179,908.40x = 37,731,005,406.96
  5. Step 5: Solve for x
    x = 37,731,005,406.96/179,908.40
  6. Step 6: Final answer
    x = 209,723.42

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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.