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Finding the Fourth Proportional to 84,571.29, 126,862.47 and 28,406.97

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Solution

The fourth proportional to 84,571.29, 126,862.47 and 28,406.97 is: 42,612.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,571.29 : 126,862.47 = 28,406.97 : x
  2. Step 2: Convert to fraction form
    84,571.29/126,862.47 = 28,406.97/x
  3. Step 3: Cross multiply
    84,571.29x = 126,862.47 × 28,406.97
  4. Step 4: Simplify right side
    84,571.29x = 3,603,778,379.42
  5. Step 5: Solve for x
    x = 3,603,778,379.42/84,571.29
  6. Step 6: Final answer
    x = 42,612.31

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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.