Home / 128,587.56-177,448.97-71,226.69

Finding the Fourth Proportional to 128,587.56, 177,448.97 and 71,226.69

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Solution

The fourth proportional to 128,587.56, 177,448.97 and 71,226.69 is: 98,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.56 : 177,448.97 = 71,226.69 : x
  2. Step 2: Convert to fraction form
    128,587.56/177,448.97 = 71,226.69/x
  3. Step 3: Cross multiply
    128,587.56x = 177,448.97 × 71,226.69
  4. Step 4: Simplify right side
    128,587.56x = 12,639,102,420.88
  5. Step 5: Solve for x
    x = 12,639,102,420.88/128,587.56
  6. Step 6: Final answer
    x = 98,291.80

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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.