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Finding the Fourth Proportional to 128,795.67, 177,744.06 and 80,426.22

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Solution

The fourth proportional to 128,795.67, 177,744.06 and 80,426.22 is: 110,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,795.67 : 177,744.06 = 80,426.22 : x
  2. Step 2: Convert to fraction form
    128,795.67/177,744.06 = 80,426.22/x
  3. Step 3: Cross multiply
    128,795.67x = 177,744.06 × 80,426.22
  4. Step 4: Simplify right side
    128,795.67x = 14,295,282,873.25
  5. Step 5: Solve for x
    x = 14,295,282,873.25/128,795.67
  6. Step 6: Final answer
    x = 110,991.95

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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.