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Finding the Fourth Proportional to 139,673.22, 192,974.55 and 97,420.38

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Solution

The fourth proportional to 139,673.22, 192,974.55 and 97,420.38 is: 134,597.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,673.22 : 192,974.55 = 97,420.38 : x
  2. Step 2: Convert to fraction form
    139,673.22/192,974.55 = 97,420.38/x
  3. Step 3: Cross multiply
    139,673.22x = 192,974.55 × 97,420.38
  4. Step 4: Simplify right side
    139,673.22x = 18,799,653,991.33
  5. Step 5: Solve for x
    x = 18,799,653,991.33/139,673.22
  6. Step 6: Final answer
    x = 134,597.41

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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.