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Finding the Fourth Proportional to 136,045.26, 203,728.50 and 85,974.30

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Solution

The fourth proportional to 136,045.26, 203,728.50 and 85,974.30 is: 128,746.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,045.26 : 203,728.50 = 85,974.30 : x
  2. Step 2: Convert to fraction form
    136,045.26/203,728.50 = 85,974.30/x
  3. Step 3: Cross multiply
    136,045.26x = 203,728.50 × 85,974.30
  4. Step 4: Simplify right side
    136,045.26x = 17,515,415,177.55
  5. Step 5: Solve for x
    x = 17,515,415,177.55/136,045.26
  6. Step 6: Final answer
    x = 128,746.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.