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Finding the Fourth Proportional to 149,059.79, 205,683.83 and 100,766.80

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Solution

The fourth proportional to 149,059.79, 205,683.83 and 100,766.80 is: 139,045.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,059.79 : 205,683.83 = 100,766.80 : x
  2. Step 2: Convert to fraction form
    149,059.79/205,683.83 = 100,766.80/x
  3. Step 3: Cross multiply
    149,059.79x = 205,683.83 × 100,766.80
  4. Step 4: Simplify right side
    149,059.79x = 20,726,101,775.40
  5. Step 5: Solve for x
    x = 20,726,101,775.40/149,059.79
  6. Step 6: Final answer
    x = 139,045.55

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1.5x scale

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.