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Finding the Fourth Proportional to 74,401.88, 102,671.64 and 40,409.60

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Solution

The fourth proportional to 74,401.88, 102,671.64 and 40,409.60 is: 55,763.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,401.88 : 102,671.64 = 40,409.60 : x
  2. Step 2: Convert to fraction form
    74,401.88/102,671.64 = 40,409.60/x
  3. Step 3: Cross multiply
    74,401.88x = 102,671.64 × 40,409.60
  4. Step 4: Simplify right side
    74,401.88x = 4,148,919,390.39
  5. Step 5: Solve for x
    x = 4,148,919,390.39/74,401.88
  6. Step 6: Final answer
    x = 55,763.64

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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.