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Finding the Fourth Proportional to 135,907.60, 204,080.10 and 91,730.20

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Solution

The fourth proportional to 135,907.60, 204,080.10 and 91,730.20 is: 137,742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,907.60 : 204,080.10 = 91,730.20 : x
  2. Step 2: Convert to fraction form
    135,907.60/204,080.10 = 91,730.20/x
  3. Step 3: Cross multiply
    135,907.60x = 204,080.10 × 91,730.20
  4. Step 4: Simplify right side
    135,907.60x = 18,720,308,389.02
  5. Step 5: Solve for x
    x = 18,720,308,389.02/135,907.60
  6. Step 6: Final answer
    x = 137,742.91

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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.