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Finding the Fourth Proportional to 203,215.29, 280,425.08 and 111,316.29

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Solution

The fourth proportional to 203,215.29, 280,425.08 and 111,316.29 is: 153,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,215.29 : 280,425.08 = 111,316.29 : x
  2. Step 2: Convert to fraction form
    203,215.29/280,425.08 = 111,316.29/x
  3. Step 3: Cross multiply
    203,215.29x = 280,425.08 × 111,316.29
  4. Step 4: Simplify right side
    203,215.29x = 31,215,879,528.55
  5. Step 5: Solve for x
    x = 31,215,879,528.55/203,215.29
  6. Step 6: Final answer
    x = 153,609.90

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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.