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Finding the Fourth Proportional to 201,720.80, 302,581.20 and 135,365.60

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Solution

The fourth proportional to 201,720.80, 302,581.20 and 135,365.60 is: 203,048.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,720.80 : 302,581.20 = 135,365.60 : x
  2. Step 2: Convert to fraction form
    201,720.80/302,581.20 = 135,365.60/x
  3. Step 3: Cross multiply
    201,720.80x = 302,581.20 × 135,365.60
  4. Step 4: Simplify right side
    201,720.80x = 40,959,085,686.72
  5. Step 5: Solve for x
    x = 40,959,085,686.72/201,720.80
  6. Step 6: Final answer
    x = 203,048.40

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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.