Home / 135,837.80-203,756.70-85,318.10

Finding the Fourth Proportional to 135,837.80, 203,756.70 and 85,318.10

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Solution

The fourth proportional to 135,837.80, 203,756.70 and 85,318.10 is: 127,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,837.80 : 203,756.70 = 85,318.10 : x
  2. Step 2: Convert to fraction form
    135,837.80/203,756.70 = 85,318.10/x
  3. Step 3: Cross multiply
    135,837.80x = 203,756.70 × 85,318.10
  4. Step 4: Simplify right side
    135,837.80x = 17,384,134,506.27
  5. Step 5: Solve for x
    x = 17,384,134,506.27/135,837.80
  6. Step 6: Final answer
    x = 127,977.15

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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.