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Finding the Fourth Proportional to 74,747.76, 111,994.76 and 45,103.30

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Solution

The fourth proportional to 74,747.76, 111,994.76 and 45,103.30 is: 67,578.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,747.76 : 111,994.76 = 45,103.30 : x
  2. Step 2: Convert to fraction form
    74,747.76/111,994.76 = 45,103.30/x
  3. Step 3: Cross multiply
    74,747.76x = 111,994.76 × 45,103.30
  4. Step 4: Simplify right side
    74,747.76x = 5,051,333,033.19
  5. Step 5: Solve for x
    x = 5,051,333,033.19/74,747.76
  6. Step 6: Final answer
    x = 67,578.39

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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.