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Finding the Fourth Proportional to 135,260.80, 203,057.60 and 85,340.80

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Solution

The fourth proportional to 135,260.80, 203,057.60 and 85,340.80 is: 128,116.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,260.80 : 203,057.60 = 85,340.80 : x
  2. Step 2: Convert to fraction form
    135,260.80/203,057.60 = 85,340.80/x
  3. Step 3: Cross multiply
    135,260.80x = 203,057.60 × 85,340.80
  4. Step 4: Simplify right side
    135,260.80x = 17,329,098,030.08
  5. Step 5: Solve for x
    x = 17,329,098,030.08/135,260.80
  6. Step 6: Final answer
    x = 128,116.19

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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.