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Finding the Fourth Proportional to 203,592.90, 305,508.42 and 85,254.34

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Solution

The fourth proportional to 203,592.90, 305,508.42 and 85,254.34 is: 127,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,592.90 : 305,508.42 = 85,254.34 : x
  2. Step 2: Convert to fraction form
    203,592.90/305,508.42 = 85,254.34/x
  3. Step 3: Cross multiply
    203,592.90x = 305,508.42 × 85,254.34
  4. Step 4: Simplify right side
    203,592.90x = 26,045,918,711.54
  5. Step 5: Solve for x
    x = 26,045,918,711.54/203,592.90
  6. Step 6: Final answer
    x = 127,931.37

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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.