Home / 128,272.20-177,015.22-71,683.56

Finding the Fourth Proportional to 128,272.20, 177,015.22 and 71,683.56

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Solution

The fourth proportional to 128,272.20, 177,015.22 and 71,683.56 is: 98,923.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.20 : 177,015.22 = 71,683.56 : x
  2. Step 2: Convert to fraction form
    128,272.20/177,015.22 = 71,683.56/x
  3. Step 3: Cross multiply
    128,272.20x = 177,015.22 × 71,683.56
  4. Step 4: Simplify right side
    128,272.20x = 12,689,081,143.78
  5. Step 5: Solve for x
    x = 12,689,081,143.78/128,272.20
  6. Step 6: Final answer
    x = 98,923.08

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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.