Home / 128,282.28-176,914.92-80,540.08

Finding the Fourth Proportional to 128,282.28, 176,914.92 and 80,540.08

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Solution

The fourth proportional to 128,282.28, 176,914.92 and 80,540.08 is: 111,073.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,282.28 : 176,914.92 = 80,540.08 : x
  2. Step 2: Convert to fraction form
    128,282.28/176,914.92 = 80,540.08/x
  3. Step 3: Cross multiply
    128,282.28x = 176,914.92 × 80,540.08
  4. Step 4: Simplify right side
    128,282.28x = 14,248,741,809.99
  5. Step 5: Solve for x
    x = 14,248,741,809.99/128,282.28
  6. Step 6: Final answer
    x = 111,073.34

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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.