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Finding the Fourth Proportional to 128,910.40, 193,365.60 and 128,910.40

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Solution

The fourth proportional to 128,910.40, 193,365.60 and 128,910.40 is: 193,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,910.40 : 193,365.60 = 128,910.40 : x
  2. Step 2: Convert to fraction form
    128,910.40/193,365.60 = 128,910.40/x
  3. Step 3: Cross multiply
    128,910.40x = 193,365.60 × 128,910.40
  4. Step 4: Simplify right side
    128,910.40x = 24,926,836,842.24
  5. Step 5: Solve for x
    x = 24,926,836,842.24/128,910.40
  6. Step 6: Final answer
    x = 193,365.60

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1.5x scale

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.