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Finding the Fourth Proportional to 84,474.80, 126,740.37 and 28,320.50

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Solution

The fourth proportional to 84,474.80, 126,740.37 and 28,320.50 is: 42,490.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,474.80 : 126,740.37 = 28,320.50 : x
  2. Step 2: Convert to fraction form
    84,474.80/126,740.37 = 28,320.50/x
  3. Step 3: Cross multiply
    84,474.80x = 126,740.37 × 28,320.50
  4. Step 4: Simplify right side
    84,474.80x = 3,589,350,648.59
  5. Step 5: Solve for x
    x = 3,589,350,648.59/84,474.80
  6. Step 6: Final answer
    x = 42,490.19

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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.