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Finding the Fourth Proportional to 139,670.33, 192,749.09 and 76,012.16

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Solution

The fourth proportional to 139,670.33, 192,749.09 and 76,012.16 is: 104,898.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,670.33 : 192,749.09 = 76,012.16 : x
  2. Step 2: Convert to fraction form
    139,670.33/192,749.09 = 76,012.16/x
  3. Step 3: Cross multiply
    139,670.33x = 192,749.09 × 76,012.16
  4. Step 4: Simplify right side
    139,670.33x = 14,651,273,325.13
  5. Step 5: Solve for x
    x = 14,651,273,325.13/139,670.33
  6. Step 6: Final answer
    x = 104,898.97

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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.