Home / 280,322.04-420,187.77-139,785.42

Finding the Fourth Proportional to 280,322.04, 420,187.77 and 139,785.42

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Solution

The fourth proportional to 280,322.04, 420,187.77 and 139,785.42 is: 209,530.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,322.04 : 420,187.77 = 139,785.42 : x
  2. Step 2: Convert to fraction form
    280,322.04/420,187.77 = 139,785.42/x
  3. Step 3: Cross multiply
    280,322.04x = 420,187.77 × 139,785.42
  4. Step 4: Simplify right side
    280,322.04x = 58,736,123,908.31
  5. Step 5: Solve for x
    x = 58,736,123,908.31/280,322.04
  6. Step 6: Final answer
    x = 209,530.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.