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Finding the Fourth Proportional to 115,442.60, 173,163.90 and 40,647.20

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Solution

The fourth proportional to 115,442.60, 173,163.90 and 40,647.20 is: 60,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,442.60 : 173,163.90 = 40,647.20 : x
  2. Step 2: Convert to fraction form
    115,442.60/173,163.90 = 40,647.20/x
  3. Step 3: Cross multiply
    115,442.60x = 173,163.90 × 40,647.20
  4. Step 4: Simplify right side
    115,442.60x = 7,038,627,676.08
  5. Step 5: Solve for x
    x = 7,038,627,676.08/115,442.60
  6. Step 6: Final answer
    x = 60,970.80

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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.