Home / 129,446,586.40-194,169,879.60-78,651,680.80

Finding the Fourth Proportional to 129,446,586.40, 194,169,879.60 and 78,651,680.80

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Solution

The fourth proportional to 129,446,586.40, 194,169,879.60 and 78,651,680.80 is: 117,977,521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,446,586.40 : 194,169,879.60 = 78,651,680.80 : x
  2. Step 2: Convert to fraction form
    129,446,586.40/194,169,879.60 = 78,651,680.80/x
  3. Step 3: Cross multiply
    129,446,586.40x = 194,169,879.60 × 78,651,680.80
  4. Step 4: Simplify right side
    129,446,586.40x = 15,271,787,391,273,630
  5. Step 5: Solve for x
    x = 15,271,787,391,273,630/129,446,586.40
  6. Step 6: Final answer
    x = 117,977,521.20

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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.