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Finding the Fourth Proportional to 40,509.70, 60,745.11 and 20,778.10

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Solution

The fourth proportional to 40,509.70, 60,745.11 and 20,778.10 is: 31,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,509.70 : 60,745.11 = 20,778.10 : x
  2. Step 2: Convert to fraction form
    40,509.70/60,745.11 = 20,778.10/x
  3. Step 3: Cross multiply
    40,509.70x = 60,745.11 × 20,778.10
  4. Step 4: Simplify right side
    40,509.70x = 1,262,167,970.09
  5. Step 5: Solve for x
    x = 1,262,167,970.09/40,509.70
  6. Step 6: Final answer
    x = 31,157.18

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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.