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Finding the Fourth Proportional to 84,474.82, 126,740.38 and 28,320.48

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Solution

The fourth proportional to 84,474.82, 126,740.38 and 28,320.48 is: 42,490.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,474.82 : 126,740.38 = 28,320.48 : x
  2. Step 2: Convert to fraction form
    84,474.82/126,740.38 = 28,320.48/x
  3. Step 3: Cross multiply
    84,474.82x = 126,740.38 × 28,320.48
  4. Step 4: Simplify right side
    84,474.82x = 3,589,348,396.98
  5. Step 5: Solve for x
    x = 3,589,348,396.98/84,474.82
  6. Step 6: Final answer
    x = 42,490.16

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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.