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Finding the Fourth Proportional to 74,076.20, 111,114.30 and 18,672.20

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Solution

The fourth proportional to 74,076.20, 111,114.30 and 18,672.20 is: 28,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,076.20 : 111,114.30 = 18,672.20 : x
  2. Step 2: Convert to fraction form
    74,076.20/111,114.30 = 18,672.20/x
  3. Step 3: Cross multiply
    74,076.20x = 111,114.30 × 18,672.20
  4. Step 4: Simplify right side
    74,076.20x = 2,074,748,432.46
  5. Step 5: Solve for x
    x = 2,074,748,432.46/74,076.20
  6. Step 6: Final answer
    x = 28,008.30

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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.