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Finding the Fourth Proportional to 163,817.20, 245,725.80 and 80,873.20

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Solution

The fourth proportional to 163,817.20, 245,725.80 and 80,873.20 is: 121,309.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,817.20 : 245,725.80 = 80,873.20 : x
  2. Step 2: Convert to fraction form
    163,817.20/245,725.80 = 80,873.20/x
  3. Step 3: Cross multiply
    163,817.20x = 245,725.80 × 80,873.20
  4. Step 4: Simplify right side
    163,817.20x = 19,872,631,768.56
  5. Step 5: Solve for x
    x = 19,872,631,768.56/163,817.20
  6. Step 6: Final answer
    x = 121,309.80

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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.