Home / 135,180.54-186,487.14-87,449.28

Finding the Fourth Proportional to 135,180.54, 186,487.14 and 87,449.28

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Solution

The fourth proportional to 135,180.54, 186,487.14 and 87,449.28 is: 120,639.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,180.54 : 186,487.14 = 87,449.28 : x
  2. Step 2: Convert to fraction form
    135,180.54/186,487.14 = 87,449.28/x
  3. Step 3: Cross multiply
    135,180.54x = 186,487.14 × 87,449.28
  4. Step 4: Simplify right side
    135,180.54x = 16,308,166,122.26
  5. Step 5: Solve for x
    x = 16,308,166,122.26/135,180.54
  6. Step 6: Final answer
    x = 120,639.89

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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.