Home / 154,688.40-231,811.20-87,987.60

Finding the Fourth Proportional to 154,688.40, 231,811.20 and 87,987.60

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Solution

The fourth proportional to 154,688.40, 231,811.20 and 87,987.60 is: 131,855.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,688.40 : 231,811.20 = 87,987.60 : x
  2. Step 2: Convert to fraction form
    154,688.40/231,811.20 = 87,987.60/x
  3. Step 3: Cross multiply
    154,688.40x = 231,811.20 × 87,987.60
  4. Step 4: Simplify right side
    154,688.40x = 20,396,511,141.12
  5. Step 5: Solve for x
    x = 20,396,511,141.12/154,688.40
  6. Step 6: Final answer
    x = 131,855.47

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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.