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Finding the Fourth Proportional to 79,291.78, 109,558.65 and 76,453.54

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Solution

The fourth proportional to 79,291.78, 109,558.65 and 76,453.54 is: 105,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,291.78 : 109,558.65 = 76,453.54 : x
  2. Step 2: Convert to fraction form
    79,291.78/109,558.65 = 76,453.54/x
  3. Step 3: Cross multiply
    79,291.78x = 109,558.65 × 76,453.54
  4. Step 4: Simplify right side
    79,291.78x = 8,376,146,630.12
  5. Step 5: Solve for x
    x = 8,376,146,630.12/79,291.78
  6. Step 6: Final answer
    x = 105,637.01

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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.