Home / 128,960.20-193,440.30-84,723.40

Finding the Fourth Proportional to 128,960.20, 193,440.30 and 84,723.40

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Solution

The fourth proportional to 128,960.20, 193,440.30 and 84,723.40 is: 127,085.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,960.20 : 193,440.30 = 84,723.40 : x
  2. Step 2: Convert to fraction form
    128,960.20/193,440.30 = 84,723.40/x
  3. Step 3: Cross multiply
    128,960.20x = 193,440.30 × 84,723.40
  4. Step 4: Simplify right side
    128,960.20x = 16,388,919,913.02
  5. Step 5: Solve for x
    x = 16,388,919,913.02/128,960.20
  6. Step 6: Final answer
    x = 127,085.10

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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.