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Finding the Fourth Proportional to 87,664.12, 120,978.42 and 49,937.56

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Solution

The fourth proportional to 87,664.12, 120,978.42 and 49,937.56 is: 68,914.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,664.12 : 120,978.42 = 49,937.56 : x
  2. Step 2: Convert to fraction form
    87,664.12/120,978.42 = 49,937.56/x
  3. Step 3: Cross multiply
    87,664.12x = 120,978.42 × 49,937.56
  4. Step 4: Simplify right side
    87,664.12x = 6,041,367,107.46
  5. Step 5: Solve for x
    x = 6,041,367,107.46/87,664.12
  6. Step 6: Final answer
    x = 68,914.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.