Home / 129,651.40-194,477.10-121,778.20

Finding the Fourth Proportional to 129,651.40, 194,477.10 and 121,778.20

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Solution

The fourth proportional to 129,651.40, 194,477.10 and 121,778.20 is: 182,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,651.40 : 194,477.10 = 121,778.20 : x
  2. Step 2: Convert to fraction form
    129,651.40/194,477.10 = 121,778.20/x
  3. Step 3: Cross multiply
    129,651.40x = 194,477.10 × 121,778.20
  4. Step 4: Simplify right side
    129,651.40x = 23,683,071,179.22
  5. Step 5: Solve for x
    x = 23,683,071,179.22/129,651.40
  6. Step 6: Final answer
    x = 182,667.30

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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.