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Finding the Fourth Proportional to 135,665.40, 203,498.10 and 69,310.20

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Solution

The fourth proportional to 135,665.40, 203,498.10 and 69,310.20 is: 103,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,665.40 : 203,498.10 = 69,310.20 : x
  2. Step 2: Convert to fraction form
    135,665.40/203,498.10 = 69,310.20/x
  3. Step 3: Cross multiply
    135,665.40x = 203,498.10 × 69,310.20
  4. Step 4: Simplify right side
    135,665.40x = 14,104,494,010.62
  5. Step 5: Solve for x
    x = 14,104,494,010.62/135,665.40
  6. Step 6: Final answer
    x = 103,965.30

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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.