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Finding the Fourth Proportional to 68,679.42, 103,035.18 and 21,292.02

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Solution

The fourth proportional to 68,679.42, 103,035.18 and 21,292.02 is: 31,943.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.42 : 103,035.18 = 21,292.02 : x
  2. Step 2: Convert to fraction form
    68,679.42/103,035.18 = 21,292.02/x
  3. Step 3: Cross multiply
    68,679.42x = 103,035.18 × 21,292.02
  4. Step 4: Simplify right side
    68,679.42x = 2,193,827,113.26
  5. Step 5: Solve for x
    x = 2,193,827,113.26/68,679.42
  6. Step 6: Final answer
    x = 31,943.01

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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.