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Finding the Fourth Proportional to 199,643.40, 299,683.80 and 111,069.90

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Solution

The fourth proportional to 199,643.40, 299,683.80 and 111,069.90 is: 166,726.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,643.40 : 299,683.80 = 111,069.90 : x
  2. Step 2: Convert to fraction form
    199,643.40/299,683.80 = 111,069.90/x
  3. Step 3: Cross multiply
    199,643.40x = 299,683.80 × 111,069.90
  4. Step 4: Simplify right side
    199,643.40x = 33,285,849,697.62
  5. Step 5: Solve for x
    x = 33,285,849,697.62/199,643.40
  6. Step 6: Final answer
    x = 166,726.52

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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.