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Finding the Fourth Proportional to 128,880.60, 193,320.90 and 126,912.30

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Solution

The fourth proportional to 128,880.60, 193,320.90 and 126,912.30 is: 190,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,880.60 : 193,320.90 = 126,912.30 : x
  2. Step 2: Convert to fraction form
    128,880.60/193,320.90 = 126,912.30/x
  3. Step 3: Cross multiply
    128,880.60x = 193,320.90 × 126,912.30
  4. Step 4: Simplify right side
    128,880.60x = 24,534,800,057.07
  5. Step 5: Solve for x
    x = 24,534,800,057.07/128,880.60
  6. Step 6: Final answer
    x = 190,368.45

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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.