Home / 128,550.62-177,378.75-80,770.13

Finding the Fourth Proportional to 128,550.62, 177,378.75 and 80,770.13

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Solution

The fourth proportional to 128,550.62, 177,378.75 and 80,770.13 is: 111,449.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,550.62 : 177,378.75 = 80,770.13 : x
  2. Step 2: Convert to fraction form
    128,550.62/177,378.75 = 80,770.13/x
  3. Step 3: Cross multiply
    128,550.62x = 177,378.75 × 80,770.13
  4. Step 4: Simplify right side
    128,550.62x = 14,326,903,809.84
  5. Step 5: Solve for x
    x = 14,326,903,809.84/128,550.62
  6. Step 6: Final answer
    x = 111,449.52

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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.