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Finding the Fourth Proportional to 139,490.22, 192,500.49 and 85,045.53

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Solution

The fourth proportional to 139,490.22, 192,500.49 and 85,045.53 is: 117,365.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,490.22 : 192,500.49 = 85,045.53 : x
  2. Step 2: Convert to fraction form
    139,490.22/192,500.49 = 85,045.53/x
  3. Step 3: Cross multiply
    139,490.22x = 192,500.49 × 85,045.53
  4. Step 4: Simplify right side
    139,490.22x = 16,371,306,197.31
  5. Step 5: Solve for x
    x = 16,371,306,197.31/139,490.22
  6. Step 6: Final answer
    x = 117,365.26

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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.