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Finding the Fourth Proportional to 79,289.80, 109,477.30 and 51,044.68

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Solution

The fourth proportional to 79,289.80, 109,477.30 and 51,044.68 is: 70,478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,289.80 : 109,477.30 = 51,044.68 : x
  2. Step 2: Convert to fraction form
    79,289.80/109,477.30 = 51,044.68/x
  3. Step 3: Cross multiply
    79,289.80x = 109,477.30 × 51,044.68
  4. Step 4: Simplify right side
    79,289.80x = 5,588,233,745.76
  5. Step 5: Solve for x
    x = 5,588,233,745.76/79,289.80
  6. Step 6: Final answer
    x = 70,478.60

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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.