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Finding the Fourth Proportional to 67,638.88, 101,392.36 and 28,207.28

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Solution

The fourth proportional to 67,638.88, 101,392.36 and 28,207.28 is: 42,283.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,638.88 : 101,392.36 = 28,207.28 : x
  2. Step 2: Convert to fraction form
    67,638.88/101,392.36 = 28,207.28/x
  3. Step 3: Cross multiply
    67,638.88x = 101,392.36 × 28,207.28
  4. Step 4: Simplify right side
    67,638.88x = 2,860,002,688.38
  5. Step 5: Solve for x
    x = 2,860,002,688.38/67,638.88
  6. Step 6: Final answer
    x = 42,283.41

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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.