Home / 128,934.20-193,401.30-86,943.80

Finding the Fourth Proportional to 128,934.20, 193,401.30 and 86,943.80

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Solution

The fourth proportional to 128,934.20, 193,401.30 and 86,943.80 is: 130,415.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.20 : 193,401.30 = 86,943.80 : x
  2. Step 2: Convert to fraction form
    128,934.20/193,401.30 = 86,943.80/x
  3. Step 3: Cross multiply
    128,934.20x = 193,401.30 × 86,943.80
  4. Step 4: Simplify right side
    128,934.20x = 16,815,043,946.94
  5. Step 5: Solve for x
    x = 16,815,043,946.94/128,934.20
  6. Step 6: Final answer
    x = 130,415.70

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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.