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Finding the Fourth Proportional to 74,145.90, 111,169.71 and 40,881.90

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Solution

The fourth proportional to 74,145.90, 111,169.71 and 40,881.90 is: 61,295.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,145.90 : 111,169.71 = 40,881.90 : x
  2. Step 2: Convert to fraction form
    74,145.90/111,169.71 = 40,881.90/x
  3. Step 3: Cross multiply
    74,145.90x = 111,169.71 × 40,881.90
  4. Step 4: Simplify right side
    74,145.90x = 4,544,828,967.25
  5. Step 5: Solve for x
    x = 4,544,828,967.25/74,145.90
  6. Step 6: Final answer
    x = 61,295.76

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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.