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Finding the Fourth Proportional to 68,010.66, 102,015.85 and 18,090.81

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Solution

The fourth proportional to 68,010.66, 102,015.85 and 18,090.81 is: 27,136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,010.66 : 102,015.85 = 18,090.81 : x
  2. Step 2: Convert to fraction form
    68,010.66/102,015.85 = 18,090.81/x
  3. Step 3: Cross multiply
    68,010.66x = 102,015.85 × 18,090.81
  4. Step 4: Simplify right side
    68,010.66x = 1,845,549,381.95
  5. Step 5: Solve for x
    x = 1,845,549,381.95/68,010.66
  6. Step 6: Final answer
    x = 27,136.18

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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.