Home / 128,328,010.70-192,492,016.05-99,662,564.30

Finding the Fourth Proportional to 128,328,010.70, 192,492,016.05 and 99,662,564.30

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Solution

The fourth proportional to 128,328,010.70, 192,492,016.05 and 99,662,564.30 is: 149,493,846.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328,010.70 : 192,492,016.05 = 99,662,564.30 : x
  2. Step 2: Convert to fraction form
    128,328,010.70/192,492,016.05 = 99,662,564.30/x
  3. Step 3: Cross multiply
    128,328,010.70x = 192,492,016.05 × 99,662,564.30
  4. Step 4: Simplify right side
    128,328,010.70x = 19,184,247,926,819,756
  5. Step 5: Solve for x
    x = 19,184,247,926,819,756/128,328,010.70
  6. Step 6: Final answer
    x = 149,493,846.45

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Similar ratio
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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.