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Finding the Fourth Proportional to 203,577.80, 305,220.90 and 85,188.20

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Solution

The fourth proportional to 203,577.80, 305,220.90 and 85,188.20 is: 127,721.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,577.80 : 305,220.90 = 85,188.20 : x
  2. Step 2: Convert to fraction form
    203,577.80/305,220.90 = 85,188.20/x
  3. Step 3: Cross multiply
    203,577.80x = 305,220.90 × 85,188.20
  4. Step 4: Simplify right side
    203,577.80x = 26,001,219,073.38
  5. Step 5: Solve for x
    x = 26,001,219,073.38/203,577.80
  6. Step 6: Final answer
    x = 127,721.29

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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.