Home / 68,878.15-103,303.62-18,945.36

Finding the Fourth Proportional to 68,878.15, 103,303.62 and 18,945.36

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Solution

The fourth proportional to 68,878.15, 103,303.62 and 18,945.36 is: 28,414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.15 : 103,303.62 = 18,945.36 : x
  2. Step 2: Convert to fraction form
    68,878.15/103,303.62 = 18,945.36/x
  3. Step 3: Cross multiply
    68,878.15x = 103,303.62 × 18,945.36
  4. Step 4: Simplify right side
    68,878.15x = 1,957,124,270.20
  5. Step 5: Solve for x
    x = 1,957,124,270.20/68,878.15
  6. Step 6: Final answer
    x = 28,414.30

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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.