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Finding the Fourth Proportional to 285,423.49, 428,163.45 and 105,556.11

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Solution

The fourth proportional to 285,423.49, 428,163.45 and 105,556.11 is: 158,344.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,423.49 : 428,163.45 = 105,556.11 : x
  2. Step 2: Convert to fraction form
    285,423.49/428,163.45 = 105,556.11/x
  3. Step 3: Cross multiply
    285,423.49x = 428,163.45 × 105,556.11
  4. Step 4: Simplify right side
    285,423.49x = 45,195,268,226.18
  5. Step 5: Solve for x
    x = 45,195,268,226.18/285,423.49
  6. Step 6: Final answer
    x = 158,344.60

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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.