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Finding the Fourth Proportional to 84,571.25, 126,852.36 and 28,411.79

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Solution

The fourth proportional to 84,571.25, 126,852.36 and 28,411.79 is: 42,616.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,571.25 : 126,852.36 = 28,411.79 : x
  2. Step 2: Convert to fraction form
    84,571.25/126,852.36 = 28,411.79/x
  3. Step 3: Cross multiply
    84,571.25x = 126,852.36 × 28,411.79
  4. Step 4: Simplify right side
    84,571.25x = 3,604,101,979.06
  5. Step 5: Solve for x
    x = 3,604,101,979.06/84,571.25
  6. Step 6: Final answer
    x = 42,616.16

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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.