Home / 128,705.96-177,470.34-80,900.84

Finding the Fourth Proportional to 128,705.96, 177,470.34 and 80,900.84

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Solution

The fourth proportional to 128,705.96, 177,470.34 and 80,900.84 is: 111,552.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,705.96 : 177,470.34 = 80,900.84 : x
  2. Step 2: Convert to fraction form
    128,705.96/177,470.34 = 80,900.84/x
  3. Step 3: Cross multiply
    128,705.96x = 177,470.34 × 80,900.84
  4. Step 4: Simplify right side
    128,705.96x = 14,357,499,581.09
  5. Step 5: Solve for x
    x = 14,357,499,581.09/128,705.96
  6. Step 6: Final answer
    x = 111,552.72

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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.