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Finding the Fourth Proportional to 139,668.03, 192,741.52 and 76,005.81

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Solution

The fourth proportional to 139,668.03, 192,741.52 and 76,005.81 is: 104,887.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.03 : 192,741.52 = 76,005.81 : x
  2. Step 2: Convert to fraction form
    139,668.03/192,741.52 = 76,005.81/x
  3. Step 3: Cross multiply
    139,668.03x = 192,741.52 × 76,005.81
  4. Step 4: Simplify right side
    139,668.03x = 14,649,475,348.23
  5. Step 5: Solve for x
    x = 14,649,475,348.23/139,668.03
  6. Step 6: Final answer
    x = 104,887.82

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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.