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Finding the Fourth Proportional to 103,618.45, 155,427.63 and 68,549.95

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Solution

The fourth proportional to 103,618.45, 155,427.63 and 68,549.95 is: 102,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.45 : 155,427.63 = 68,549.95 : x
  2. Step 2: Convert to fraction form
    103,618.45/155,427.63 = 68,549.95/x
  3. Step 3: Cross multiply
    103,618.45x = 155,427.63 × 68,549.95
  4. Step 4: Simplify right side
    103,618.45x = 10,654,556,265.12
  5. Step 5: Solve for x
    x = 10,654,556,265.12/103,618.45
  6. Step 6: Final answer
    x = 102,824.90

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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.