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Finding the Fourth Proportional to 68,935.31, 103,410.15 and 19,015.41

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Solution

The fourth proportional to 68,935.31, 103,410.15 and 19,015.41 is: 28,525.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,935.31 : 103,410.15 = 19,015.41 : x
  2. Step 2: Convert to fraction form
    68,935.31/103,410.15 = 19,015.41/x
  3. Step 3: Cross multiply
    68,935.31x = 103,410.15 × 19,015.41
  4. Step 4: Simplify right side
    68,935.31x = 1,966,386,400.41
  5. Step 5: Solve for x
    x = 1,966,386,400.41/68,935.31
  6. Step 6: Final answer
    x = 28,525.10

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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.