Home / 205,072.20-307,389.60-78,663.60

Finding the Fourth Proportional to 205,072.20, 307,389.60 and 78,663.60

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Solution

The fourth proportional to 205,072.20, 307,389.60 and 78,663.60 is: 117,911.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,072.20 : 307,389.60 = 78,663.60 : x
  2. Step 2: Convert to fraction form
    205,072.20/307,389.60 = 78,663.60/x
  3. Step 3: Cross multiply
    205,072.20x = 307,389.60 × 78,663.60
  4. Step 4: Simplify right side
    205,072.20x = 24,180,372,538.56
  5. Step 5: Solve for x
    x = 24,180,372,538.56/205,072.20
  6. Step 6: Final answer
    x = 117,911.51

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1.5x scale

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.