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Finding the Fourth Proportional to 135,875.54, 203,706.12 and 85,850.21

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Solution

The fourth proportional to 135,875.54, 203,706.12 and 85,850.21 is: 128,707.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,875.54 : 203,706.12 = 85,850.21 : x
  2. Step 2: Convert to fraction form
    135,875.54/203,706.12 = 85,850.21/x
  3. Step 3: Cross multiply
    135,875.54x = 203,706.12 × 85,850.21
  4. Step 4: Simplify right side
    135,875.54x = 17,488,214,011.49
  5. Step 5: Solve for x
    x = 17,488,214,011.49/135,875.54
  6. Step 6: Final answer
    x = 128,707.59

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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.