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Finding the Fourth Proportional to 69,291.80, 103,913.40 and 36,000.80

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Solution

The fourth proportional to 69,291.80, 103,913.40 and 36,000.80 is: 53,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,291.80 : 103,913.40 = 36,000.80 : x
  2. Step 2: Convert to fraction form
    69,291.80/103,913.40 = 36,000.80/x
  3. Step 3: Cross multiply
    69,291.80x = 103,913.40 × 36,000.80
  4. Step 4: Simplify right side
    69,291.80x = 3,740,965,530.72
  5. Step 5: Solve for x
    x = 3,740,965,530.72/69,291.80
  6. Step 6: Final answer
    x = 53,988.57

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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.