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Finding the Fourth Proportional to 190,341.72, 285,401.91 and 72,022.20

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Solution

The fourth proportional to 190,341.72, 285,401.91 and 72,022.20 is: 107,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,341.72 : 285,401.91 = 72,022.20 : x
  2. Step 2: Convert to fraction form
    190,341.72/285,401.91 = 72,022.20/x
  3. Step 3: Cross multiply
    190,341.72x = 285,401.91 × 72,022.20
  4. Step 4: Simplify right side
    190,341.72x = 20,555,273,442.40
  5. Step 5: Solve for x
    x = 20,555,273,442.40/190,341.72
  6. Step 6: Final answer
    x = 107,991.42

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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.