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Finding the Fourth Proportional to 205,260.60, 307,890.90 and 121,279.80

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Solution

The fourth proportional to 205,260.60, 307,890.90 and 121,279.80 is: 181,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,260.60 : 307,890.90 = 121,279.80 : x
  2. Step 2: Convert to fraction form
    205,260.60/307,890.90 = 121,279.80/x
  3. Step 3: Cross multiply
    205,260.60x = 307,890.90 × 121,279.80
  4. Step 4: Simplify right side
    205,260.60x = 37,340,946,773.82
  5. Step 5: Solve for x
    x = 37,340,946,773.82/205,260.60
  6. Step 6: Final answer
    x = 181,919.70

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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.