Home / 128,498.32-177,324.94-71,134.36

Finding the Fourth Proportional to 128,498.32, 177,324.94 and 71,134.36

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Solution

The fourth proportional to 128,498.32, 177,324.94 and 71,134.36 is: 98,163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,498.32 : 177,324.94 = 71,134.36 : x
  2. Step 2: Convert to fraction form
    128,498.32/177,324.94 = 71,134.36/x
  3. Step 3: Cross multiply
    128,498.32x = 177,324.94 × 71,134.36
  4. Step 4: Simplify right side
    128,498.32x = 12,613,896,118.94
  5. Step 5: Solve for x
    x = 12,613,896,118.94/128,498.32
  6. Step 6: Final answer
    x = 98,163.90

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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.