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Finding the Fourth Proportional to 67,820.72, 101,712.60 and 28,371.44

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Solution

The fourth proportional to 67,820.72, 101,712.60 and 28,371.44 is: 42,549.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,820.72 : 101,712.60 = 28,371.44 : x
  2. Step 2: Convert to fraction form
    67,820.72/101,712.60 = 28,371.44/x
  3. Step 3: Cross multiply
    67,820.72x = 101,712.60 × 28,371.44
  4. Step 4: Simplify right side
    67,820.72x = 2,885,732,928.14
  5. Step 5: Solve for x
    x = 2,885,732,928.14/67,820.72
  6. Step 6: Final answer
    x = 42,549.43

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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.