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Finding the Fourth Proportional to 74,019.60, 111,029.40 and 49,087.80

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Solution

The fourth proportional to 74,019.60, 111,029.40 and 49,087.80 is: 73,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,019.60 : 111,029.40 = 49,087.80 : x
  2. Step 2: Convert to fraction form
    74,019.60/111,029.40 = 49,087.80/x
  3. Step 3: Cross multiply
    74,019.60x = 111,029.40 × 49,087.80
  4. Step 4: Simplify right side
    74,019.60x = 5,450,188,981.32
  5. Step 5: Solve for x
    x = 5,450,188,981.32/74,019.60
  6. Step 6: Final answer
    x = 73,631.70

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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.