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Finding the Fourth Proportional to 203,430.20, 305,145.30 and 170,187.80

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Solution

The fourth proportional to 203,430.20, 305,145.30 and 170,187.80 is: 255,281.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,430.20 : 305,145.30 = 170,187.80 : x
  2. Step 2: Convert to fraction form
    203,430.20/305,145.30 = 170,187.80/x
  3. Step 3: Cross multiply
    203,430.20x = 305,145.30 × 170,187.80
  4. Step 4: Simplify right side
    203,430.20x = 51,932,007,287.34
  5. Step 5: Solve for x
    x = 51,932,007,287.34/203,430.20
  6. Step 6: Final answer
    x = 255,281.70

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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.