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Finding the Fourth Proportional to 199,140.80, 298,711.20 and 125,412.80

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Solution

The fourth proportional to 199,140.80, 298,711.20 and 125,412.80 is: 188,119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,140.80 : 298,711.20 = 125,412.80 : x
  2. Step 2: Convert to fraction form
    199,140.80/298,711.20 = 125,412.80/x
  3. Step 3: Cross multiply
    199,140.80x = 298,711.20 × 125,412.80
  4. Step 4: Simplify right side
    199,140.80x = 37,462,207,983.36
  5. Step 5: Solve for x
    x = 37,462,207,983.36/199,140.80
  6. Step 6: Final answer
    x = 188,119.20

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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.