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Finding the Fourth Proportional to 178,812, 267,809.76 and 85,383.36

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Solution

The fourth proportional to 178,812, 267,809.76 and 85,383.36 is: 127,880.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,812 : 267,809.76 = 85,383.36 : x
  2. Step 2: Convert to fraction form
    178,812/267,809.76 = 85,383.36/x
  3. Step 3: Cross multiply
    178,812x = 267,809.76 × 85,383.36
  4. Step 4: Simplify right side
    178,812x = 22,866,497,149.59
  5. Step 5: Solve for x
    x = 22,866,497,149.59/178,812
  6. Step 6: Final answer
    x = 127,880.10

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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.