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Finding the Fourth Proportional to 252,710.87, 378,939.51 and 84,171.92

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Solution

The fourth proportional to 252,710.87, 378,939.51 and 84,171.92 is: 126,215.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,710.87 : 378,939.51 = 84,171.92 : x
  2. Step 2: Convert to fraction form
    252,710.87/378,939.51 = 84,171.92/x
  3. Step 3: Cross multiply
    252,710.87x = 378,939.51 × 84,171.92
  4. Step 4: Simplify right side
    252,710.87x = 31,896,064,225.86
  5. Step 5: Solve for x
    x = 31,896,064,225.86/252,710.87
  6. Step 6: Final answer
    x = 126,215.64

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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.