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Finding the Fourth Proportional to 203,070.54, 280,228.22 and 112,420.12

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Solution

The fourth proportional to 203,070.54, 280,228.22 and 112,420.12 is: 155,134.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,070.54 : 280,228.22 = 112,420.12 : x
  2. Step 2: Convert to fraction form
    203,070.54/280,228.22 = 112,420.12/x
  3. Step 3: Cross multiply
    203,070.54x = 280,228.22 × 112,420.12
  4. Step 4: Simplify right side
    203,070.54x = 31,503,290,119.79
  5. Step 5: Solve for x
    x = 31,503,290,119.79/203,070.54
  6. Step 6: Final answer
    x = 155,134.71

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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.