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Finding the Fourth Proportional to 68,975.94, 103,380.30 and 31,484.64

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Solution

The fourth proportional to 68,975.94, 103,380.30 and 31,484.64 is: 47,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,975.94 : 103,380.30 = 31,484.64 : x
  2. Step 2: Convert to fraction form
    68,975.94/103,380.30 = 31,484.64/x
  3. Step 3: Cross multiply
    68,975.94x = 103,380.30 × 31,484.64
  4. Step 4: Simplify right side
    68,975.94x = 3,254,891,528.59
  5. Step 5: Solve for x
    x = 3,254,891,528.59/68,975.94
  6. Step 6: Final answer
    x = 47,188.80

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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.