Home / 128,975.40-193,463.10-81,736.20

Finding the Fourth Proportional to 128,975.40, 193,463.10 and 81,736.20

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Solution

The fourth proportional to 128,975.40, 193,463.10 and 81,736.20 is: 122,604.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,975.40 : 193,463.10 = 81,736.20 : x
  2. Step 2: Convert to fraction form
    128,975.40/193,463.10 = 81,736.20/x
  3. Step 3: Cross multiply
    128,975.40x = 193,463.10 × 81,736.20
  4. Step 4: Simplify right side
    128,975.40x = 15,812,938,634.22
  5. Step 5: Solve for x
    x = 15,812,938,634.22/128,975.40
  6. Step 6: Final answer
    x = 122,604.30

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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.