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Finding the Fourth Proportional to 74,140.20, 111,210.30 and 18,736.20

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Solution

The fourth proportional to 74,140.20, 111,210.30 and 18,736.20 is: 28,104.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,140.20 : 111,210.30 = 18,736.20 : x
  2. Step 2: Convert to fraction form
    74,140.20/111,210.30 = 18,736.20/x
  3. Step 3: Cross multiply
    74,140.20x = 111,210.30 × 18,736.20
  4. Step 4: Simplify right side
    74,140.20x = 2,083,658,422.86
  5. Step 5: Solve for x
    x = 2,083,658,422.86/74,140.20
  6. Step 6: Final answer
    x = 28,104.30

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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.