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Finding the Fourth Proportional to 135,718.70, 203,480.85 and 56,792.30

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Solution

The fourth proportional to 135,718.70, 203,480.85 and 56,792.30 is: 85,147.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,718.70 : 203,480.85 = 56,792.30 : x
  2. Step 2: Convert to fraction form
    135,718.70/203,480.85 = 56,792.30/x
  3. Step 3: Cross multiply
    135,718.70x = 203,480.85 × 56,792.30
  4. Step 4: Simplify right side
    135,718.70x = 11,556,145,477.46
  5. Step 5: Solve for x
    x = 11,556,145,477.46/135,718.70
  6. Step 6: Final answer
    x = 85,147.78

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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.