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Finding the Fourth Proportional to 81,323.52, 121,995.12 and 28,722.24

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Solution

The fourth proportional to 81,323.52, 121,995.12 and 28,722.24 is: 43,086.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.52 : 121,995.12 = 28,722.24 : x
  2. Step 2: Convert to fraction form
    81,323.52/121,995.12 = 28,722.24/x
  3. Step 3: Cross multiply
    81,323.52x = 121,995.12 × 28,722.24
  4. Step 4: Simplify right side
    81,323.52x = 3,503,973,115.47
  5. Step 5: Solve for x
    x = 3,503,973,115.47/81,323.52
  6. Step 6: Final answer
    x = 43,086.84

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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.