Home / 215,015.28-322,588.20-86,865.84

Finding the Fourth Proportional to 215,015.28, 322,588.20 and 86,865.84

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Solution

The fourth proportional to 215,015.28, 322,588.20 and 86,865.84 is: 130,325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,015.28 : 322,588.20 = 86,865.84 : x
  2. Step 2: Convert to fraction form
    215,015.28/322,588.20 = 86,865.84/x
  3. Step 3: Cross multiply
    215,015.28x = 322,588.20 × 86,865.84
  4. Step 4: Simplify right side
    215,015.28x = 28,021,894,967.09
  5. Step 5: Solve for x
    x = 28,021,894,967.09/215,015.28
  6. Step 6: Final answer
    x = 130,325.13

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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.