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Finding the Fourth Proportional to 199,929.94, 299,910.36 and 66,810.66

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Solution

The fourth proportional to 199,929.94, 299,910.36 and 66,810.66 is: 100,221.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,929.94 : 299,910.36 = 66,810.66 : x
  2. Step 2: Convert to fraction form
    199,929.94/299,910.36 = 66,810.66/x
  3. Step 3: Cross multiply
    199,929.94x = 299,910.36 × 66,810.66
  4. Step 4: Simplify right side
    199,929.94x = 20,037,208,758.38
  5. Step 5: Solve for x
    x = 20,037,208,758.38/199,929.94
  6. Step 6: Final answer
    x = 100,221.15

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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.