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Finding the Fourth Proportional to 74,378.25, 111,567.38 and 18,974.25

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Solution

The fourth proportional to 74,378.25, 111,567.38 and 18,974.25 is: 28,461.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,378.25 : 111,567.38 = 18,974.25 : x
  2. Step 2: Convert to fraction form
    74,378.25/111,567.38 = 18,974.25/x
  3. Step 3: Cross multiply
    74,378.25x = 111,567.38 × 18,974.25
  4. Step 4: Simplify right side
    74,378.25x = 2,116,907,265.09
  5. Step 5: Solve for x
    x = 2,116,907,265.09/74,378.25
  6. Step 6: Final answer
    x = 28,461.38

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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.