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Finding the Fourth Proportional to 68,274.48, 102,368.88 and 20,873.82

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Solution

The fourth proportional to 68,274.48, 102,368.88 and 20,873.82 is: 31,297.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,274.48 : 102,368.88 = 20,873.82 : x
  2. Step 2: Convert to fraction form
    68,274.48/102,368.88 = 20,873.82/x
  3. Step 3: Cross multiply
    68,274.48x = 102,368.88 × 20,873.82
  4. Step 4: Simplify right side
    68,274.48x = 2,136,829,574.72
  5. Step 5: Solve for x
    x = 2,136,829,574.72/68,274.48
  6. Step 6: Final answer
    x = 31,297.63

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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.