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Finding the Fourth Proportional to 199,611.20, 299,458.40 and 66,532.80

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Solution

The fourth proportional to 199,611.20, 299,458.40 and 66,532.80 is: 99,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,611.20 : 299,458.40 = 66,532.80 : x
  2. Step 2: Convert to fraction form
    199,611.20/299,458.40 = 66,532.80/x
  3. Step 3: Cross multiply
    199,611.20x = 299,458.40 × 66,532.80
  4. Step 4: Simplify right side
    199,611.20x = 19,923,805,835.52
  5. Step 5: Solve for x
    x = 19,923,805,835.52/199,611.20
  6. Step 6: Final answer
    x = 99,813.07

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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.