Home / 128,086.40-191,692.20-117,588.80

Finding the Fourth Proportional to 128,086.40, 191,692.20 and 117,588.80

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Solution

The fourth proportional to 128,086.40, 191,692.20 and 117,588.80 is: 175,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,086.40 : 191,692.20 = 117,588.80 : x
  2. Step 2: Convert to fraction form
    128,086.40/191,692.20 = 117,588.80/x
  3. Step 3: Cross multiply
    128,086.40x = 191,692.20 × 117,588.80
  4. Step 4: Simplify right side
    128,086.40x = 22,540,855,767.36
  5. Step 5: Solve for x
    x = 22,540,855,767.36/128,086.40
  6. Step 6: Final answer
    x = 175,981.65

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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.