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Finding the Fourth Proportional to 74,141.90, 111,163.71 and 40,877.90

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Solution

The fourth proportional to 74,141.90, 111,163.71 and 40,877.90 is: 61,289.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,141.90 : 111,163.71 = 40,877.90 : x
  2. Step 2: Convert to fraction form
    74,141.90/111,163.71 = 40,877.90/x
  3. Step 3: Cross multiply
    74,141.90x = 111,163.71 × 40,877.90
  4. Step 4: Simplify right side
    74,141.90x = 4,544,139,021.01
  5. Step 5: Solve for x
    x = 4,544,139,021.01/74,141.90
  6. Step 6: Final answer
    x = 61,289.76

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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.