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Finding the Fourth Proportional to 84,735.36, 126,948.13 and 39,674.05

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Solution

The fourth proportional to 84,735.36, 126,948.13 and 39,674.05 is: 59,438.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,735.36 : 126,948.13 = 39,674.05 : x
  2. Step 2: Convert to fraction form
    84,735.36/126,948.13 = 39,674.05/x
  3. Step 3: Cross multiply
    84,735.36x = 126,948.13 × 39,674.05
  4. Step 4: Simplify right side
    84,735.36x = 5,036,546,040.47
  5. Step 5: Solve for x
    x = 5,036,546,040.47/84,735.36
  6. Step 6: Final answer
    x = 59,438.54

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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.