Home / 215,811.40-323,619.90-82,647.40

Finding the Fourth Proportional to 215,811.40, 323,619.90 and 82,647.40

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Solution

The fourth proportional to 215,811.40, 323,619.90 and 82,647.40 is: 123,933.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,811.40 : 323,619.90 = 82,647.40 : x
  2. Step 2: Convert to fraction form
    215,811.40/323,619.90 = 82,647.40/x
  3. Step 3: Cross multiply
    215,811.40x = 323,619.90 × 82,647.40
  4. Step 4: Simplify right side
    215,811.40x = 26,746,343,323.26
  5. Step 5: Solve for x
    x = 26,746,343,323.26/215,811.40
  6. Step 6: Final answer
    x = 123,933.88

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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.