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Finding the Fourth Proportional to 205,379.18, 308,103.80 and 91,568.28

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Solution

The fourth proportional to 205,379.18, 308,103.80 and 91,568.28 is: 137,368.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,379.18 : 308,103.80 = 91,568.28 : x
  2. Step 2: Convert to fraction form
    205,379.18/308,103.80 = 91,568.28/x
  3. Step 3: Cross multiply
    205,379.18x = 308,103.80 × 91,568.28
  4. Step 4: Simplify right side
    205,379.18x = 28,212,535,027.46
  5. Step 5: Solve for x
    x = 28,212,535,027.46/205,379.18
  6. Step 6: Final answer
    x = 137,368.04

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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.