Home / 129,763.40-194,645.10-121,890.20

Finding the Fourth Proportional to 129,763.40, 194,645.10 and 121,890.20

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Solution

The fourth proportional to 129,763.40, 194,645.10 and 121,890.20 is: 182,835.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,763.40 : 194,645.10 = 121,890.20 : x
  2. Step 2: Convert to fraction form
    129,763.40/194,645.10 = 121,890.20/x
  3. Step 3: Cross multiply
    129,763.40x = 194,645.10 × 121,890.20
  4. Step 4: Simplify right side
    129,763.40x = 23,725,330,168.02
  5. Step 5: Solve for x
    x = 23,725,330,168.02/129,763.40
  6. Step 6: Final answer
    x = 182,835.30

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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.