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Finding the Fourth Proportional to 99,320.80, 149,007.60 and 43,136.80

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Solution

The fourth proportional to 99,320.80, 149,007.60 and 43,136.80 is: 64,716.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,320.80 : 149,007.60 = 43,136.80 : x
  2. Step 2: Convert to fraction form
    99,320.80/149,007.60 = 43,136.80/x
  3. Step 3: Cross multiply
    99,320.80x = 149,007.60 × 43,136.80
  4. Step 4: Simplify right side
    99,320.80x = 6,427,711,039.68
  5. Step 5: Solve for x
    x = 6,427,711,039.68/99,320.80
  6. Step 6: Final answer
    x = 64,716.67

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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.