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Finding the Fourth Proportional to 203,079.26, 280,240.26 and 112,428.86

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Solution

The fourth proportional to 203,079.26, 280,240.26 and 112,428.86 is: 155,146.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,079.26 : 280,240.26 = 112,428.86 : x
  2. Step 2: Convert to fraction form
    203,079.26/280,240.26 = 112,428.86/x
  3. Step 3: Cross multiply
    203,079.26x = 280,240.26 × 112,428.86
  4. Step 4: Simplify right side
    203,079.26x = 31,507,092,957.90
  5. Step 5: Solve for x
    x = 31,507,092,957.90/203,079.26
  6. Step 6: Final answer
    x = 155,146.78

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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.