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Finding the Fourth Proportional to 259,315.25, 388,751.00 and 99,505.88

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Solution

The fourth proportional to 259,315.25, 388,751.00 and 99,505.88 is: 149,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,315.25 : 388,751.00 = 99,505.88 : x
  2. Step 2: Convert to fraction form
    259,315.25/388,751.00 = 99,505.88/x
  3. Step 3: Cross multiply
    259,315.25x = 388,751.00 × 99,505.88
  4. Step 4: Simplify right side
    259,315.25x = 38,683,007,914.60
  5. Step 5: Solve for x
    x = 38,683,007,914.60/259,315.25
  6. Step 6: Final answer
    x = 149,173.67

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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.