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Finding the Fourth Proportional to 128,895.60, 193,343.40 and 120,147.60

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Solution

The fourth proportional to 128,895.60, 193,343.40 and 120,147.60 is: 180,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,895.60 : 193,343.40 = 120,147.60 : x
  2. Step 2: Convert to fraction form
    128,895.60/193,343.40 = 120,147.60/x
  3. Step 3: Cross multiply
    128,895.60x = 193,343.40 × 120,147.60
  4. Step 4: Simplify right side
    128,895.60x = 23,229,745,485.84
  5. Step 5: Solve for x
    x = 23,229,745,485.84/128,895.60
  6. Step 6: Final answer
    x = 180,221.40

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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.