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Finding the Fourth Proportional to 74,725.80, 103,118.48 and 40,733.54

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Solution

The fourth proportional to 74,725.80, 103,118.48 and 40,733.54 is: 56,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,725.80 : 103,118.48 = 40,733.54 : x
  2. Step 2: Convert to fraction form
    74,725.80/103,118.48 = 40,733.54/x
  3. Step 3: Cross multiply
    74,725.80x = 103,118.48 × 40,733.54
  4. Step 4: Simplify right side
    74,725.80x = 4,200,380,729.82
  5. Step 5: Solve for x
    x = 4,200,380,729.82/74,725.80
  6. Step 6: Final answer
    x = 56,210.58

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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.