Home / 128,261.26-176,885.94-80,519.05

Finding the Fourth Proportional to 128,261.26, 176,885.94 and 80,519.05

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Solution

The fourth proportional to 128,261.26, 176,885.94 and 80,519.05 is: 111,044.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261.26 : 176,885.94 = 80,519.05 : x
  2. Step 2: Convert to fraction form
    128,261.26/176,885.94 = 80,519.05/x
  3. Step 3: Cross multiply
    128,261.26x = 176,885.94 × 80,519.05
  4. Step 4: Simplify right side
    128,261.26x = 14,242,687,847.16
  5. Step 5: Solve for x
    x = 14,242,687,847.16/128,261.26
  6. Step 6: Final answer
    x = 111,044.35

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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.