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Finding the Fourth Proportional to 245,280.20, 367,920.30 and 126,987.80

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Solution

The fourth proportional to 245,280.20, 367,920.30 and 126,987.80 is: 190,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,280.20 : 367,920.30 = 126,987.80 : x
  2. Step 2: Convert to fraction form
    245,280.20/367,920.30 = 126,987.80/x
  3. Step 3: Cross multiply
    245,280.20x = 367,920.30 × 126,987.80
  4. Step 4: Simplify right side
    245,280.20x = 46,721,389,472.34
  5. Step 5: Solve for x
    x = 46,721,389,472.34/245,280.20
  6. Step 6: Final answer
    x = 190,481.70

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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.