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Finding the Fourth Proportional to 239,711.20, 359,667.60 and 128,773.60

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Solution

The fourth proportional to 239,711.20, 359,667.60 and 128,773.60 is: 193,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,711.20 : 359,667.60 = 128,773.60 : x
  2. Step 2: Convert to fraction form
    239,711.20/359,667.60 = 128,773.60/x
  3. Step 3: Cross multiply
    239,711.20x = 359,667.60 × 128,773.60
  4. Step 4: Simplify right side
    239,711.20x = 46,315,691,655.36
  5. Step 5: Solve for x
    x = 46,315,691,655.36/239,711.20
  6. Step 6: Final answer
    x = 193,214.55

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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.