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Finding the Fourth Proportional to 53,163.40, 79,745.20 and 49,915.70

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Solution

The fourth proportional to 53,163.40, 79,745.20 and 49,915.70 is: 74,873.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,163.40 : 79,745.20 = 49,915.70 : x
  2. Step 2: Convert to fraction form
    53,163.40/79,745.20 = 49,915.70/x
  3. Step 3: Cross multiply
    53,163.40x = 79,745.20 × 49,915.70
  4. Step 4: Simplify right side
    53,163.40x = 3,980,537,479.64
  5. Step 5: Solve for x
    x = 3,980,537,479.64/53,163.40
  6. Step 6: Final answer
    x = 74,873.64

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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.