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Finding the Fourth Proportional to 79,239.63, 109,351.55 and 43,428.87

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Solution

The fourth proportional to 79,239.63, 109,351.55 and 43,428.87 is: 59,932.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,239.63 : 109,351.55 = 43,428.87 : x
  2. Step 2: Convert to fraction form
    79,239.63/109,351.55 = 43,428.87/x
  3. Step 3: Cross multiply
    79,239.63x = 109,351.55 × 43,428.87
  4. Step 4: Simplify right side
    79,239.63x = 4,749,014,032.10
  5. Step 5: Solve for x
    x = 4,749,014,032.10/79,239.63
  6. Step 6: Final answer
    x = 59,932.31

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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.