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Finding the Fourth Proportional to 205,601.60, 308,457.28 and 87,279.68

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Solution

The fourth proportional to 205,601.60, 308,457.28 and 87,279.68 is: 130,942.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,601.60 : 308,457.28 = 87,279.68 : x
  2. Step 2: Convert to fraction form
    205,601.60/308,457.28 = 87,279.68/x
  3. Step 3: Cross multiply
    205,601.60x = 308,457.28 × 87,279.68
  4. Step 4: Simplify right side
    205,601.60x = 26,922,052,692.07
  5. Step 5: Solve for x
    x = 26,922,052,692.07/205,601.60
  6. Step 6: Final answer
    x = 130,942.82

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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.