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Finding the Fourth Proportional to 102,911.80, 154,367.70 and 43,749.40

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Solution

The fourth proportional to 102,911.80, 154,367.70 and 43,749.40 is: 65,624.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,911.80 : 154,367.70 = 43,749.40 : x
  2. Step 2: Convert to fraction form
    102,911.80/154,367.70 = 43,749.40/x
  3. Step 3: Cross multiply
    102,911.80x = 154,367.70 × 43,749.40
  4. Step 4: Simplify right side
    102,911.80x = 6,753,494,254.38
  5. Step 5: Solve for x
    x = 6,753,494,254.38/102,911.80
  6. Step 6: Final answer
    x = 65,624.10

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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.