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Finding the Fourth Proportional to 68,697.02, 103,060.31 and 21,311.16

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Solution

The fourth proportional to 68,697.02, 103,060.31 and 21,311.16 is: 31,971.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,697.02 : 103,060.31 = 21,311.16 : x
  2. Step 2: Convert to fraction form
    68,697.02/103,060.31 = 21,311.16/x
  3. Step 3: Cross multiply
    68,697.02x = 103,060.31 × 21,311.16
  4. Step 4: Simplify right side
    68,697.02x = 2,196,334,649.50
  5. Step 5: Solve for x
    x = 2,196,334,649.50/68,697.02
  6. Step 6: Final answer
    x = 31,971.33

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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.