Home / 115,909.20-173,863.80-87,915.60

Finding the Fourth Proportional to 115,909.20, 173,863.80 and 87,915.60

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Solution

The fourth proportional to 115,909.20, 173,863.80 and 87,915.60 is: 131,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.20 : 173,863.80 = 87,915.60 : x
  2. Step 2: Convert to fraction form
    115,909.20/173,863.80 = 87,915.60/x
  3. Step 3: Cross multiply
    115,909.20x = 173,863.80 × 87,915.60
  4. Step 4: Simplify right side
    115,909.20x = 15,285,340,295.28
  5. Step 5: Solve for x
    x = 15,285,340,295.28/115,909.20
  6. Step 6: Final answer
    x = 131,873.40

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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.