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Finding the Fourth Proportional to 99,768.35, 149,673.90 and 28,690.35

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Solution

The fourth proportional to 99,768.35, 149,673.90 and 28,690.35 is: 43,041.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,768.35 : 149,673.90 = 28,690.35 : x
  2. Step 2: Convert to fraction form
    99,768.35/149,673.90 = 28,690.35/x
  3. Step 3: Cross multiply
    99,768.35x = 149,673.90 × 28,690.35
  4. Step 4: Simplify right side
    99,768.35x = 4,294,196,576.87
  5. Step 5: Solve for x
    x = 4,294,196,576.87/99,768.35
  6. Step 6: Final answer
    x = 43,041.67

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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.