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Finding the Fourth Proportional to 74,484.87, 102,789.54 and 40,493.61

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Solution

The fourth proportional to 74,484.87, 102,789.54 and 40,493.61 is: 55,881.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,484.87 : 102,789.54 = 40,493.61 : x
  2. Step 2: Convert to fraction form
    74,484.87/102,789.54 = 40,493.61/x
  3. Step 3: Cross multiply
    74,484.87x = 102,789.54 × 40,493.61
  4. Step 4: Simplify right side
    74,484.87x = 4,162,319,544.84
  5. Step 5: Solve for x
    x = 4,162,319,544.84/74,484.87
  6. Step 6: Final answer
    x = 55,881.41

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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.