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Finding the Fourth Proportional to 145.09, 199.99 and 103.03

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Solution

The fourth proportional to 145.09, 199.99 and 103.03 is: 142.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.09 : 199.99 = 103.03 : x
  2. Step 2: Convert to fraction form
    145.09/199.99 = 103.03/x
  3. Step 3: Cross multiply
    145.09x = 199.99 × 103.03
  4. Step 4: Simplify right side
    145.09x = 20,603.45
  5. Step 5: Solve for x
    x = 20,603.45/145.09
  6. Step 6: Final answer
    x = 142.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.