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Finding the Fourth Proportional to 135,487.10, 203,230.65 and 85,404.80

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Solution

The fourth proportional to 135,487.10, 203,230.65 and 85,404.80 is: 128,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,487.10 : 203,230.65 = 85,404.80 : x
  2. Step 2: Convert to fraction form
    135,487.10/203,230.65 = 85,404.80/x
  3. Step 3: Cross multiply
    135,487.10x = 203,230.65 × 85,404.80
  4. Step 4: Simplify right side
    135,487.10x = 17,356,873,017.12
  5. Step 5: Solve for x
    x = 17,356,873,017.12/135,487.10
  6. Step 6: Final answer
    x = 128,107.20

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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.