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Finding the Fourth Proportional to 68,813.23, 103,220 and 18,894.01

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Solution

The fourth proportional to 68,813.23, 103,220 and 18,894.01 is: 28,341.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,813.23 : 103,220 = 18,894.01 : x
  2. Step 2: Convert to fraction form
    68,813.23/103,220 = 18,894.01/x
  3. Step 3: Cross multiply
    68,813.23x = 103,220 × 18,894.01
  4. Step 4: Simplify right side
    68,813.23x = 1,950,239,712.20
  5. Step 5: Solve for x
    x = 1,950,239,712.20/68,813.23
  6. Step 6: Final answer
    x = 28,341.06

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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.