Home / 115,913.20-173,869.80-87,919.60

Finding the Fourth Proportional to 115,913.20, 173,869.80 and 87,919.60

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Solution

The fourth proportional to 115,913.20, 173,869.80 and 87,919.60 is: 131,879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,913.20 : 173,869.80 = 87,919.60 : x
  2. Step 2: Convert to fraction form
    115,913.20/173,869.80 = 87,919.60/x
  3. Step 3: Cross multiply
    115,913.20x = 173,869.80 × 87,919.60
  4. Step 4: Simplify right side
    115,913.20x = 15,286,563,268.08
  5. Step 5: Solve for x
    x = 15,286,563,268.08/115,913.20
  6. Step 6: Final answer
    x = 131,879.40

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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.