Home / 81,521.85-122,288.01-28,218.97

Finding the Fourth Proportional to 81,521.85, 122,288.01 and 28,218.97

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Solution

The fourth proportional to 81,521.85, 122,288.01 and 28,218.97 is: 42,330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,521.85 : 122,288.01 = 28,218.97 : x
  2. Step 2: Convert to fraction form
    81,521.85/122,288.01 = 28,218.97/x
  3. Step 3: Cross multiply
    81,521.85x = 122,288.01 × 28,218.97
  4. Step 4: Simplify right side
    81,521.85x = 3,450,841,685.55
  5. Step 5: Solve for x
    x = 3,450,841,685.55/81,521.85
  6. Step 6: Final answer
    x = 42,330.27

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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.