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Finding the Fourth Proportional to 110,683.99, 166,138.98 and 81,013.69

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Solution

The fourth proportional to 110,683.99, 166,138.98 and 81,013.69 is: 121,603.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,683.99 : 166,138.98 = 81,013.69 : x
  2. Step 2: Convert to fraction form
    110,683.99/166,138.98 = 81,013.69/x
  3. Step 3: Cross multiply
    110,683.99x = 166,138.98 × 81,013.69
  4. Step 4: Simplify right side
    110,683.99x = 13,459,531,822.64
  5. Step 5: Solve for x
    x = 13,459,531,822.64/110,683.99
  6. Step 6: Final answer
    x = 121,603.24

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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.