Home / 203,128.39-280,313.71-112,482.40

Finding the Fourth Proportional to 203,128.39, 280,313.71 and 112,482.40

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Solution

The fourth proportional to 203,128.39, 280,313.71 and 112,482.40 is: 155,223.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,128.39 : 280,313.71 = 112,482.40 : x
  2. Step 2: Convert to fraction form
    203,128.39/280,313.71 = 112,482.40/x
  3. Step 3: Cross multiply
    203,128.39x = 280,313.71 × 112,482.40
  4. Step 4: Simplify right side
    203,128.39x = 31,530,357,871.71
  5. Step 5: Solve for x
    x = 31,530,357,871.71/203,128.39
  6. Step 6: Final answer
    x = 155,223.79

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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.