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Finding the Fourth Proportional to 113,979.20, 159,920.80 and 113,979.20

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Solution

The fourth proportional to 113,979.20, 159,920.80 and 113,979.20 is: 159,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,979.20 : 159,920.80 = 113,979.20 : x
  2. Step 2: Convert to fraction form
    113,979.20/159,920.80 = 113,979.20/x
  3. Step 3: Cross multiply
    113,979.20x = 159,920.80 × 113,979.20
  4. Step 4: Simplify right side
    113,979.20x = 18,227,644,847.36
  5. Step 5: Solve for x
    x = 18,227,644,847.36/113,979.20
  6. Step 6: Final answer
    x = 159,920.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.