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Finding the Fourth Proportional to 139,491.22, 192,501.87 and 85,046.53

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Solution

The fourth proportional to 139,491.22, 192,501.87 and 85,046.53 is: 117,366.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,491.22 : 192,501.87 = 85,046.53 : x
  2. Step 2: Convert to fraction form
    139,491.22/192,501.87 = 85,046.53/x
  3. Step 3: Cross multiply
    139,491.22x = 192,501.87 × 85,046.53
  4. Step 4: Simplify right side
    139,491.22x = 16,371,616,062.01
  5. Step 5: Solve for x
    x = 16,371,616,062.01/139,491.22
  6. Step 6: Final answer
    x = 117,366.64

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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.