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Finding the Fourth Proportional to 128,380.56, 177,178.41 and 73,934.51

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Solution

The fourth proportional to 128,380.56, 177,178.41 and 73,934.51 is: 102,037.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,380.56 : 177,178.41 = 73,934.51 : x
  2. Step 2: Convert to fraction form
    128,380.56/177,178.41 = 73,934.51/x
  3. Step 3: Cross multiply
    128,380.56x = 177,178.41 × 73,934.51
  4. Step 4: Simplify right side
    128,380.56x = 13,099,598,995.45
  5. Step 5: Solve for x
    x = 13,099,598,995.45/128,380.56
  6. Step 6: Final answer
    x = 102,037.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.