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Finding the Fourth Proportional to 74,382.21, 111,573.27 and 18,978.21

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Solution

The fourth proportional to 74,382.21, 111,573.27 and 18,978.21 is: 28,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,382.21 : 111,573.27 = 18,978.21 : x
  2. Step 2: Convert to fraction form
    74,382.21/111,573.27 = 18,978.21/x
  3. Step 3: Cross multiply
    74,382.21x = 111,573.27 × 18,978.21
  4. Step 4: Simplify right side
    74,382.21x = 2,117,460,948.45
  5. Step 5: Solve for x
    x = 2,117,460,948.45/74,382.21
  6. Step 6: Final answer
    x = 28,467.30

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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.