Home / 128,385.06-177,179.58-71,796.84

Finding the Fourth Proportional to 128,385.06, 177,179.58 and 71,796.84

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Solution

The fourth proportional to 128,385.06, 177,179.58 and 71,796.84 is: 99,084.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,385.06 : 177,179.58 = 71,796.84 : x
  2. Step 2: Convert to fraction form
    128,385.06/177,179.58 = 71,796.84/x
  3. Step 3: Cross multiply
    128,385.06x = 177,179.58 × 71,796.84
  4. Step 4: Simplify right side
    128,385.06x = 12,720,933,956.53
  5. Step 5: Solve for x
    x = 12,720,933,956.53/128,385.06
  6. Step 6: Final answer
    x = 99,084.22

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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.