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Finding the Fourth Proportional to 149,059.66, 205,683.64 and 100,766.66

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Solution

The fourth proportional to 149,059.66, 205,683.64 and 100,766.66 is: 139,045.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,059.66 : 205,683.64 = 100,766.66 : x
  2. Step 2: Convert to fraction form
    149,059.66/205,683.64 = 100,766.66/x
  3. Step 3: Cross multiply
    149,059.66x = 205,683.64 × 100,766.66
  4. Step 4: Simplify right side
    149,059.66x = 20,726,053,419.44
  5. Step 5: Solve for x
    x = 20,726,053,419.44/149,059.66
  6. Step 6: Final answer
    x = 139,045.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.