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Finding the Fourth Proportional to 194,390.80, 291,701.40 and 128,021.20

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Solution

The fourth proportional to 194,390.80, 291,701.40 and 128,021.20 is: 192,107.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,390.80 : 291,701.40 = 128,021.20 : x
  2. Step 2: Convert to fraction form
    194,390.80/291,701.40 = 128,021.20/x
  3. Step 3: Cross multiply
    194,390.80x = 291,701.40 × 128,021.20
  4. Step 4: Simplify right side
    194,390.80x = 37,343,963,269.68
  5. Step 5: Solve for x
    x = 37,343,963,269.68/194,390.80
  6. Step 6: Final answer
    x = 192,107.67

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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.