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Finding the Fourth Proportional to 180,646.20, 270,859.95 and 80,787.78

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Solution

The fourth proportional to 180,646.20, 270,859.95 and 80,787.78 is: 121,132.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,646.20 : 270,859.95 = 80,787.78 : x
  2. Step 2: Convert to fraction form
    180,646.20/270,859.95 = 80,787.78/x
  3. Step 3: Cross multiply
    180,646.20x = 270,859.95 × 80,787.78
  4. Step 4: Simplify right side
    180,646.20x = 21,882,174,051.41
  5. Step 5: Solve for x
    x = 21,882,174,051.41/180,646.20
  6. Step 6: Final answer
    x = 121,132.77

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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.