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Finding the Fourth Proportional to 205,817.31, 308,762.69 and 72,774.81

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Solution

The fourth proportional to 205,817.31, 308,762.69 and 72,774.81 is: 109,175.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,817.31 : 308,762.69 = 72,774.81 : x
  2. Step 2: Convert to fraction form
    205,817.31/308,762.69 = 72,774.81/x
  3. Step 3: Cross multiply
    205,817.31x = 308,762.69 × 72,774.81
  4. Step 4: Simplify right side
    205,817.31x = 22,470,145,735.96
  5. Step 5: Solve for x
    x = 22,470,145,735.96/205,817.31
  6. Step 6: Final answer
    x = 109,175.20

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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.