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Finding the Fourth Proportional to 74,130.88, 111,183.80 and 20,810.63

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Solution

The fourth proportional to 74,130.88, 111,183.80 and 20,810.63 is: 31,212.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,130.88 : 111,183.80 = 20,810.63 : x
  2. Step 2: Convert to fraction form
    74,130.88/111,183.80 = 20,810.63/x
  3. Step 3: Cross multiply
    74,130.88x = 111,183.80 × 20,810.63
  4. Step 4: Simplify right side
    74,130.88x = 2,313,804,367.88
  5. Step 5: Solve for x
    x = 2,313,804,367.88/74,130.88
  6. Step 6: Final answer
    x = 31,212.42

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1.5x scale

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.