Home / 128,650.16-177,623.86-80,325.66

Finding the Fourth Proportional to 128,650.16, 177,623.86 and 80,325.66

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Solution

The fourth proportional to 128,650.16, 177,623.86 and 80,325.66 is: 110,903.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650.16 : 177,623.86 = 80,325.66 : x
  2. Step 2: Convert to fraction form
    128,650.16/177,623.86 = 80,325.66/x
  3. Step 3: Cross multiply
    128,650.16x = 177,623.86 × 80,325.66
  4. Step 4: Simplify right side
    128,650.16x = 14,267,753,786.25
  5. Step 5: Solve for x
    x = 14,267,753,786.25/128,650.16
  6. Step 6: Final answer
    x = 110,903.51

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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.