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Finding the Fourth Proportional to 203,640.66, 305,053.38 and 97,128.30

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Solution

The fourth proportional to 203,640.66, 305,053.38 and 97,128.30 is: 145,498.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,640.66 : 305,053.38 = 97,128.30 : x
  2. Step 2: Convert to fraction form
    203,640.66/305,053.38 = 97,128.30/x
  3. Step 3: Cross multiply
    203,640.66x = 305,053.38 × 97,128.30
  4. Step 4: Simplify right side
    203,640.66x = 29,629,316,208.65
  5. Step 5: Solve for x
    x = 29,629,316,208.65/203,640.66
  6. Step 6: Final answer
    x = 145,498.04

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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.