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Finding the Fourth Proportional to 68,702.24, 103,068.07 and 21,316.30

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Solution

The fourth proportional to 68,702.24, 103,068.07 and 21,316.30 is: 31,979.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,702.24 : 103,068.07 = 21,316.30 : x
  2. Step 2: Convert to fraction form
    68,702.24/103,068.07 = 21,316.30/x
  3. Step 3: Cross multiply
    68,702.24x = 103,068.07 × 21,316.30
  4. Step 4: Simplify right side
    68,702.24x = 2,197,029,589.58
  5. Step 5: Solve for x
    x = 2,197,029,589.58/68,702.24
  6. Step 6: Final answer
    x = 31,979.01

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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.