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Finding the Fourth Proportional to 203,474.08, 280,789.20 and 112,830.40

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Solution

The fourth proportional to 203,474.08, 280,789.20 and 112,830.40 is: 155,703.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,474.08 : 280,789.20 = 112,830.40 : x
  2. Step 2: Convert to fraction form
    203,474.08/280,789.20 = 112,830.40/x
  3. Step 3: Cross multiply
    203,474.08x = 280,789.20 × 112,830.40
  4. Step 4: Simplify right side
    203,474.08x = 31,681,557,751.68
  5. Step 5: Solve for x
    x = 31,681,557,751.68/203,474.08
  6. Step 6: Final answer
    x = 155,703.16

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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.