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Finding the Fourth Proportional to 99,328.80, 149,019.60 and 43,144.80

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Solution

The fourth proportional to 99,328.80, 149,019.60 and 43,144.80 is: 64,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,328.80 : 149,019.60 = 43,144.80 : x
  2. Step 2: Convert to fraction form
    99,328.80/149,019.60 = 43,144.80/x
  3. Step 3: Cross multiply
    99,328.80x = 149,019.60 × 43,144.80
  4. Step 4: Simplify right side
    99,328.80x = 6,429,420,838.08
  5. Step 5: Solve for x
    x = 6,429,420,838.08/99,328.80
  6. Step 6: Final answer
    x = 64,728.67

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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.