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Finding the Fourth Proportional to 68,859.88, 103,288.44 and 45,316.14

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Solution

The fourth proportional to 68,859.88, 103,288.44 and 45,316.14 is: 67,973.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,859.88 : 103,288.44 = 45,316.14 : x
  2. Step 2: Convert to fraction form
    68,859.88/103,288.44 = 45,316.14/x
  3. Step 3: Cross multiply
    68,859.88x = 103,288.44 × 45,316.14
  4. Step 4: Simplify right side
    68,859.88x = 4,680,633,407.42
  5. Step 5: Solve for x
    x = 4,680,633,407.42/68,859.88
  6. Step 6: Final answer
    x = 67,973.30

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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.