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Finding the Fourth Proportional to 199,818.72, 299,741.76 and 66,693.60

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Solution

The fourth proportional to 199,818.72, 299,741.76 and 66,693.60 is: 100,044.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,818.72 : 299,741.76 = 66,693.60 : x
  2. Step 2: Convert to fraction form
    199,818.72/299,741.76 = 66,693.60/x
  3. Step 3: Cross multiply
    199,818.72x = 299,741.76 × 66,693.60
  4. Step 4: Simplify right side
    199,818.72x = 19,990,857,044.74
  5. Step 5: Solve for x
    x = 19,990,857,044.74/199,818.72
  6. Step 6: Final answer
    x = 100,044.97

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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.