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Finding the Fourth Proportional to 239,938.40, 360,129.01 and 121,692.78

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Solution

The fourth proportional to 239,938.40, 360,129.01 and 121,692.78 is: 182,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,938.40 : 360,129.01 = 121,692.78 : x
  2. Step 2: Convert to fraction form
    239,938.40/360,129.01 = 121,692.78/x
  3. Step 3: Cross multiply
    239,938.40x = 360,129.01 × 121,692.78
  4. Step 4: Simplify right side
    239,938.40x = 43,825,100,081.32
  5. Step 5: Solve for x
    x = 43,825,100,081.32/239,938.40
  6. Step 6: Final answer
    x = 182,651.46

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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.