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Finding the Fourth Proportional to 68,638.01, 102,916.32 and 21,239.07

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Solution

The fourth proportional to 68,638.01, 102,916.32 and 21,239.07 is: 31,846.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.01 : 102,916.32 = 21,239.07 : x
  2. Step 2: Convert to fraction form
    68,638.01/102,916.32 = 21,239.07/x
  3. Step 3: Cross multiply
    68,638.01x = 102,916.32 × 21,239.07
  4. Step 4: Simplify right side
    68,638.01x = 2,185,846,924.62
  5. Step 5: Solve for x
    x = 2,185,846,924.62/68,638.01
  6. Step 6: Final answer
    x = 31,846.01

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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.