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Finding the Fourth Proportional to 68,690.91, 103,051.06 and 21,304.96

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Solution

The fourth proportional to 68,690.91, 103,051.06 and 21,304.96 is: 31,962.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,690.91 : 103,051.06 = 21,304.96 : x
  2. Step 2: Convert to fraction form
    68,690.91/103,051.06 = 21,304.96/x
  3. Step 3: Cross multiply
    68,690.91x = 103,051.06 × 21,304.96
  4. Step 4: Simplify right side
    68,690.91x = 2,195,498,895.03
  5. Step 5: Solve for x
    x = 2,195,498,895.03/68,690.91
  6. Step 6: Final answer
    x = 31,962.00

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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.