Home / 74,381.69-111,485.06-61,172.21

Finding the Fourth Proportional to 74,381.69, 111,485.06 and 61,172.21

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Solution

The fourth proportional to 74,381.69, 111,485.06 and 61,172.21 is: 91,686.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,381.69 : 111,485.06 = 61,172.21 : x
  2. Step 2: Convert to fraction form
    74,381.69/111,485.06 = 61,172.21/x
  3. Step 3: Cross multiply
    74,381.69x = 111,485.06 × 61,172.21
  4. Step 4: Simplify right side
    74,381.69x = 6,819,787,704.43
  5. Step 5: Solve for x
    x = 6,819,787,704.43/74,381.69
  6. Step 6: Final answer
    x = 91,686.37

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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.