Home / 128,429.25-177,228.34-71,065.11

Finding the Fourth Proportional to 128,429.25, 177,228.34 and 71,065.11

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Solution

The fourth proportional to 128,429.25, 177,228.34 and 71,065.11 is: 98,067.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.25 : 177,228.34 = 71,065.11 : x
  2. Step 2: Convert to fraction form
    128,429.25/177,228.34 = 71,065.11/x
  3. Step 3: Cross multiply
    128,429.25x = 177,228.34 × 71,065.11
  4. Step 4: Simplify right side
    128,429.25x = 12,594,751,477.22
  5. Step 5: Solve for x
    x = 12,594,751,477.22/128,429.25
  6. Step 6: Final answer
    x = 98,067.62

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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.