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Finding the Fourth Proportional to 74,789.70, 112,205.81 and 30,448.27

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Solution

The fourth proportional to 74,789.70, 112,205.81 and 30,448.27 is: 45,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,789.70 : 112,205.81 = 30,448.27 : x
  2. Step 2: Convert to fraction form
    74,789.70/112,205.81 = 30,448.27/x
  3. Step 3: Cross multiply
    74,789.70x = 112,205.81 × 30,448.27
  4. Step 4: Simplify right side
    74,789.70x = 3,416,472,798.45
  5. Step 5: Solve for x
    x = 3,416,472,798.45/74,789.70
  6. Step 6: Final answer
    x = 45,681.06

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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.