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Finding the Fourth Proportional to 79,269.79, 109,389.94 and 43,458.58

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Solution

The fourth proportional to 79,269.79, 109,389.94 and 43,458.58 is: 59,971.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,269.79 : 109,389.94 = 43,458.58 : x
  2. Step 2: Convert to fraction form
    79,269.79/109,389.94 = 43,458.58/x
  3. Step 3: Cross multiply
    79,269.79x = 109,389.94 × 43,458.58
  4. Step 4: Simplify right side
    79,269.79x = 4,753,931,076.56
  5. Step 5: Solve for x
    x = 4,753,931,076.56/79,269.79
  6. Step 6: Final answer
    x = 59,971.54

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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.