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Finding the Fourth Proportional to 199,412.40, 299,118.60 and 115,431.60

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Solution

The fourth proportional to 199,412.40, 299,118.60 and 115,431.60 is: 173,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,412.40 : 299,118.60 = 115,431.60 : x
  2. Step 2: Convert to fraction form
    199,412.40/299,118.60 = 115,431.60/x
  3. Step 3: Cross multiply
    199,412.40x = 299,118.60 × 115,431.60
  4. Step 4: Simplify right side
    199,412.40x = 34,527,738,587.76
  5. Step 5: Solve for x
    x = 34,527,738,587.76/199,412.40
  6. Step 6: Final answer
    x = 173,147.40

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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.