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Finding the Fourth Proportional to 128,713.68, 177,564.84 and 80,993.34

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Solution

The fourth proportional to 128,713.68, 177,564.84 and 80,993.34 is: 111,733.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,713.68 : 177,564.84 = 80,993.34 : x
  2. Step 2: Convert to fraction form
    128,713.68/177,564.84 = 80,993.34/x
  3. Step 3: Cross multiply
    128,713.68x = 177,564.84 × 80,993.34
  4. Step 4: Simplify right side
    128,713.68x = 14,381,569,458.17
  5. Step 5: Solve for x
    x = 14,381,569,458.17/128,713.68
  6. Step 6: Final answer
    x = 111,733.03

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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.