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Finding the Fourth Proportional to 185,720.45, 278,691.34 and 67,401.01

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Solution

The fourth proportional to 185,720.45, 278,691.34 and 67,401.01 is: 101,141.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,720.45 : 278,691.34 = 67,401.01 : x
  2. Step 2: Convert to fraction form
    185,720.45/278,691.34 = 67,401.01/x
  3. Step 3: Cross multiply
    185,720.45x = 278,691.34 × 67,401.01
  4. Step 4: Simplify right side
    185,720.45x = 18,784,076,929.02
  5. Step 5: Solve for x
    x = 18,784,076,929.02/185,720.45
  6. Step 6: Final answer
    x = 101,141.68

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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.