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Finding the Fourth Proportional to 139,427.01, 192,408.77 and 79,009.16

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Solution

The fourth proportional to 139,427.01, 192,408.77 and 79,009.16 is: 109,032.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,427.01 : 192,408.77 = 79,009.16 : x
  2. Step 2: Convert to fraction form
    139,427.01/192,408.77 = 79,009.16/x
  3. Step 3: Cross multiply
    139,427.01x = 192,408.77 × 79,009.16
  4. Step 4: Simplify right side
    139,427.01x = 15,202,053,937.24
  5. Step 5: Solve for x
    x = 15,202,053,937.24/139,427.01
  6. Step 6: Final answer
    x = 109,032.35

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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.