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Finding the Fourth Proportional to 99,518.10, 148,949.10 and 69,993.60

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Solution

The fourth proportional to 99,518.10, 148,949.10 and 69,993.60 is: 104,759.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,518.10 : 148,949.10 = 69,993.60 : x
  2. Step 2: Convert to fraction form
    99,518.10/148,949.10 = 69,993.60/x
  3. Step 3: Cross multiply
    99,518.10x = 148,949.10 × 69,993.60
  4. Step 4: Simplify right side
    99,518.10x = 10,425,483,725.76
  5. Step 5: Solve for x
    x = 10,425,483,725.76/99,518.10
  6. Step 6: Final answer
    x = 104,759.67

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1.5x scale

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.