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Finding the Fourth Proportional to 118,652.80, 177,979.20 and 71,996.80

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Solution

The fourth proportional to 118,652.80, 177,979.20 and 71,996.80 is: 107,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,652.80 : 177,979.20 = 71,996.80 : x
  2. Step 2: Convert to fraction form
    118,652.80/177,979.20 = 71,996.80/x
  3. Step 3: Cross multiply
    118,652.80x = 177,979.20 × 71,996.80
  4. Step 4: Simplify right side
    118,652.80x = 12,813,932,866.56
  5. Step 5: Solve for x
    x = 12,813,932,866.56/118,652.80
  6. Step 6: Final answer
    x = 107,995.20

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1.5x scale

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.