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Finding the Fourth Proportional to 149,072.47, 205,684.41 and 100,764.47

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Solution

The fourth proportional to 149,072.47, 205,684.41 and 100,764.47 is: 139,030.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,072.47 : 205,684.41 = 100,764.47 : x
  2. Step 2: Convert to fraction form
    149,072.47/205,684.41 = 100,764.47/x
  3. Step 3: Cross multiply
    149,072.47x = 205,684.41 × 100,764.47
  4. Step 4: Simplify right side
    149,072.47x = 20,725,681,452.99
  5. Step 5: Solve for x
    x = 20,725,681,452.99/149,072.47
  6. Step 6: Final answer
    x = 139,030.91

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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.