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Finding the Fourth Proportional to 201,871.20, 302,223.60 and 123,139.20

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Solution

The fourth proportional to 201,871.20, 302,223.60 and 123,139.20 is: 184,353.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,871.20 : 302,223.60 = 123,139.20 : x
  2. Step 2: Convert to fraction form
    201,871.20/302,223.60 = 123,139.20/x
  3. Step 3: Cross multiply
    201,871.20x = 302,223.60 × 123,139.20
  4. Step 4: Simplify right side
    201,871.20x = 37,215,572,325.12
  5. Step 5: Solve for x
    x = 37,215,572,325.12/201,871.20
  6. Step 6: Final answer
    x = 184,353.05

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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.