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Finding the Fourth Proportional to 205,510.40, 308,440.56 and 80,938.88

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Solution

The fourth proportional to 205,510.40, 308,440.56 and 80,938.88 is: 121,477.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,510.40 : 308,440.56 = 80,938.88 : x
  2. Step 2: Convert to fraction form
    205,510.40/308,440.56 = 80,938.88/x
  3. Step 3: Cross multiply
    205,510.40x = 308,440.56 × 80,938.88
  4. Step 4: Simplify right side
    205,510.40x = 24,964,831,930.77
  5. Step 5: Solve for x
    x = 24,964,831,930.77/205,510.40
  6. Step 6: Final answer
    x = 121,477.22

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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.