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Finding the Fourth Proportional to 201,480.90, 302,221.35 and 142,431.90

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Solution

The fourth proportional to 201,480.90, 302,221.35 and 142,431.90 is: 213,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,480.90 : 302,221.35 = 142,431.90 : x
  2. Step 2: Convert to fraction form
    201,480.90/302,221.35 = 142,431.90/x
  3. Step 3: Cross multiply
    201,480.90x = 302,221.35 × 142,431.90
  4. Step 4: Simplify right side
    201,480.90x = 43,045,961,101.07
  5. Step 5: Solve for x
    x = 43,045,961,101.07/201,480.90
  6. Step 6: Final answer
    x = 213,647.85

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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.