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Finding the Fourth Proportional to 79,421.72, 119,135.44 and 39,957.36

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Solution

The fourth proportional to 79,421.72, 119,135.44 and 39,957.36 is: 59,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,421.72 : 119,135.44 = 39,957.36 : x
  2. Step 2: Convert to fraction form
    79,421.72/119,135.44 = 39,957.36/x
  3. Step 3: Cross multiply
    79,421.72x = 119,135.44 × 39,957.36
  4. Step 4: Simplify right side
    79,421.72x = 4,760,337,664.84
  5. Step 5: Solve for x
    x = 4,760,337,664.84/79,421.72
  6. Step 6: Final answer
    x = 59,937.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.