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Finding the Fourth Proportional to 139,749.13, 192,871.22 and 79,339.33

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Solution

The fourth proportional to 139,749.13, 192,871.22 and 79,339.33 is: 109,498.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,749.13 : 192,871.22 = 79,339.33 : x
  2. Step 2: Convert to fraction form
    139,749.13/192,871.22 = 79,339.33/x
  3. Step 3: Cross multiply
    139,749.13x = 192,871.22 × 79,339.33
  4. Step 4: Simplify right side
    139,749.13x = 15,302,272,492.21
  5. Step 5: Solve for x
    x = 15,302,272,492.21/139,749.13
  6. Step 6: Final answer
    x = 109,498.16

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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.