Home / 128,426.18-177,207.41-80,645.69

Finding the Fourth Proportional to 128,426.18, 177,207.41 and 80,645.69

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Solution

The fourth proportional to 128,426.18, 177,207.41 and 80,645.69 is: 111,278.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,426.18 : 177,207.41 = 80,645.69 : x
  2. Step 2: Convert to fraction form
    128,426.18/177,207.41 = 80,645.69/x
  3. Step 3: Cross multiply
    128,426.18x = 177,207.41 × 80,645.69
  4. Step 4: Simplify right side
    128,426.18x = 14,291,014,497.20
  5. Step 5: Solve for x
    x = 14,291,014,497.20/128,426.18
  6. Step 6: Final answer
    x = 111,278.05

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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.