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Finding the Fourth Proportional to 203,490.65, 280,913.52 and 135,620.75

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Solution

The fourth proportional to 203,490.65, 280,913.52 and 135,620.75 is: 187,220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,490.65 : 280,913.52 = 135,620.75 : x
  2. Step 2: Convert to fraction form
    203,490.65/280,913.52 = 135,620.75/x
  3. Step 3: Cross multiply
    203,490.65x = 280,913.52 × 135,620.75
  4. Step 4: Simplify right side
    203,490.65x = 38,097,700,862.97
  5. Step 5: Solve for x
    x = 38,097,700,862.97/203,490.65
  6. Step 6: Final answer
    x = 187,220.90

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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.