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Finding the Fourth Proportional to 68,115.94, 102,190.31 and 21,368.81

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Solution

The fourth proportional to 68,115.94, 102,190.31 and 21,368.81 is: 32,058.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,115.94 : 102,190.31 = 21,368.81 : x
  2. Step 2: Convert to fraction form
    68,115.94/102,190.31 = 21,368.81/x
  3. Step 3: Cross multiply
    68,115.94x = 102,190.31 × 21,368.81
  4. Step 4: Simplify right side
    68,115.94x = 2,183,685,547.00
  5. Step 5: Solve for x
    x = 2,183,685,547.00/68,115.94
  6. Step 6: Final answer
    x = 32,058.36

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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.