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Finding the Fourth Proportional to 135,201, 186,512.58 and 87,469.32

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Solution

The fourth proportional to 135,201, 186,512.58 and 87,469.32 is: 120,665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,201 : 186,512.58 = 87,469.32 : x
  2. Step 2: Convert to fraction form
    135,201/186,512.58 = 87,469.32/x
  3. Step 3: Cross multiply
    135,201x = 186,512.58 × 87,469.32
  4. Step 4: Simplify right side
    135,201x = 16,314,128,544.05
  5. Step 5: Solve for x
    x = 16,314,128,544.05/135,201
  6. Step 6: Final answer
    x = 120,665.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.