Home / 215,987.20-324,000.96-81,015.28

Finding the Fourth Proportional to 215,987.20, 324,000.96 and 81,015.28

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Solution

The fourth proportional to 215,987.20, 324,000.96 and 81,015.28 is: 121,530.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,987.20 : 324,000.96 = 81,015.28 : x
  2. Step 2: Convert to fraction form
    215,987.20/324,000.96 = 81,015.28/x
  3. Step 3: Cross multiply
    215,987.20x = 324,000.96 × 81,015.28
  4. Step 4: Simplify right side
    215,987.20x = 26,249,028,494.67
  5. Step 5: Solve for x
    x = 26,249,028,494.67/215,987.20
  6. Step 6: Final answer
    x = 121,530.48

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1.5x scale

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.