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Finding the Fourth Proportional to 135,015.80, 202,499.40 and 85,006.40

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Solution

The fourth proportional to 135,015.80, 202,499.40 and 85,006.40 is: 127,494.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,015.80 : 202,499.40 = 85,006.40 : x
  2. Step 2: Convert to fraction form
    135,015.80/202,499.40 = 85,006.40/x
  3. Step 3: Cross multiply
    135,015.80x = 202,499.40 × 85,006.40
  4. Step 4: Simplify right side
    135,015.80x = 17,213,744,996.16
  5. Step 5: Solve for x
    x = 17,213,744,996.16/135,015.80
  6. Step 6: Final answer
    x = 127,494.30

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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.