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Finding the Fourth Proportional to 68,649.52, 102,959.88 and 19,390

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Solution

The fourth proportional to 68,649.52, 102,959.88 and 19,390 is: 29,080.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,649.52 : 102,959.88 = 19,390 : x
  2. Step 2: Convert to fraction form
    68,649.52/102,959.88 = 19,390/x
  3. Step 3: Cross multiply
    68,649.52x = 102,959.88 × 19,390
  4. Step 4: Simplify right side
    68,649.52x = 1,996,392,073.20
  5. Step 5: Solve for x
    x = 1,996,392,073.20/68,649.52
  6. Step 6: Final answer
    x = 29,080.93

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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.