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Finding the Fourth Proportional to 84,329.82, 126,513.93 and 28,922.46

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Solution

The fourth proportional to 84,329.82, 126,513.93 and 28,922.46 is: 43,390.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,329.82 : 126,513.93 = 28,922.46 : x
  2. Step 2: Convert to fraction form
    84,329.82/126,513.93 = 28,922.46/x
  3. Step 3: Cross multiply
    84,329.82x = 126,513.93 × 28,922.46
  4. Step 4: Simplify right side
    84,329.82x = 3,659,094,079.87
  5. Step 5: Solve for x
    x = 3,659,094,079.87/84,329.82
  6. Step 6: Final answer
    x = 43,390.27

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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.