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Finding the Fourth Proportional to 69,211.40, 103,598.40 and 54,339.80

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Solution

The fourth proportional to 69,211.40, 103,598.40 and 54,339.80 is: 81,337.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,211.40 : 103,598.40 = 54,339.80 : x
  2. Step 2: Convert to fraction form
    69,211.40/103,598.40 = 54,339.80/x
  3. Step 3: Cross multiply
    69,211.40x = 103,598.40 × 54,339.80
  4. Step 4: Simplify right side
    69,211.40x = 5,629,516,336.32
  5. Step 5: Solve for x
    x = 5,629,516,336.32/69,211.40
  6. Step 6: Final answer
    x = 81,337.99

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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.