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Finding the Fourth Proportional to 289,975.80, 435,093.30 and 103,121.40

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Solution

The fourth proportional to 289,975.80, 435,093.30 and 103,121.40 is: 154,728.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,975.80 : 435,093.30 = 103,121.40 : x
  2. Step 2: Convert to fraction form
    289,975.80/435,093.30 = 103,121.40/x
  3. Step 3: Cross multiply
    289,975.80x = 435,093.30 × 103,121.40
  4. Step 4: Simplify right side
    289,975.80x = 44,867,430,226.62
  5. Step 5: Solve for x
    x = 44,867,430,226.62/289,975.80
  6. Step 6: Final answer
    x = 154,728.19

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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.