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Finding the Fourth Proportional to 60,372.20, 90,537.78 and 20,920.10

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Solution

The fourth proportional to 60,372.20, 90,537.78 and 20,920.10 is: 31,373.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,372.20 : 90,537.78 = 20,920.10 : x
  2. Step 2: Convert to fraction form
    60,372.20/90,537.78 = 20,920.10/x
  3. Step 3: Cross multiply
    60,372.20x = 90,537.78 × 20,920.10
  4. Step 4: Simplify right side
    60,372.20x = 1,894,058,958.69
  5. Step 5: Solve for x
    x = 1,894,058,958.69/60,372.20
  6. Step 6: Final answer
    x = 31,373.03

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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.