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Finding the Fourth Proportional to 74,620.40, 112,060.20 and 39,628.40

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Solution

The fourth proportional to 74,620.40, 112,060.20 and 39,628.40 is: 59,511.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,620.40 : 112,060.20 = 39,628.40 : x
  2. Step 2: Convert to fraction form
    74,620.40/112,060.20 = 39,628.40/x
  3. Step 3: Cross multiply
    74,620.40x = 112,060.20 × 39,628.40
  4. Step 4: Simplify right side
    74,620.40x = 4,440,766,429.68
  5. Step 5: Solve for x
    x = 4,440,766,429.68/74,620.40
  6. Step 6: Final answer
    x = 59,511.43

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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.