Home / 220,082.05-303,785.40-129,433.74

Finding the Fourth Proportional to 220,082.05, 303,785.40 and 129,433.74

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Solution

The fourth proportional to 220,082.05, 303,785.40 and 129,433.74 is: 178,661.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,082.05 : 303,785.40 = 129,433.74 : x
  2. Step 2: Convert to fraction form
    220,082.05/303,785.40 = 129,433.74/x
  3. Step 3: Cross multiply
    220,082.05x = 303,785.40 × 129,433.74
  4. Step 4: Simplify right side
    220,082.05x = 39,320,080,479.40
  5. Step 5: Solve for x
    x = 39,320,080,479.40/220,082.05
  6. Step 6: Final answer
    x = 178,661.01

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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.