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Finding the Fourth Proportional to 79,270.31, 109,390.12 and 43,459.54

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Solution

The fourth proportional to 79,270.31, 109,390.12 and 43,459.54 is: 59,972.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,270.31 : 109,390.12 = 43,459.54 : x
  2. Step 2: Convert to fraction form
    79,270.31/109,390.12 = 43,459.54/x
  3. Step 3: Cross multiply
    79,270.31x = 109,390.12 × 43,459.54
  4. Step 4: Simplify right side
    79,270.31x = 4,754,044,295.74
  5. Step 5: Solve for x
    x = 4,754,044,295.74/79,270.31
  6. Step 6: Final answer
    x = 59,972.57

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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.