Home / 129,341,796.60-194,012,694.90-78,197,489.40

Finding the Fourth Proportional to 129,341,796.60, 194,012,694.90 and 78,197,489.40

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Solution

The fourth proportional to 129,341,796.60, 194,012,694.90 and 78,197,489.40 is: 117,296,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,341,796.60 : 194,012,694.90 = 78,197,489.40 : x
  2. Step 2: Convert to fraction form
    129,341,796.60/194,012,694.90 = 78,197,489.40/x
  3. Step 3: Cross multiply
    129,341,796.60x = 194,012,694.90 × 78,197,489.40
  4. Step 4: Simplify right side
    129,341,796.60x = 15,171,305,652,908,186
  5. Step 5: Solve for x
    x = 15,171,305,652,908,186/129,341,796.60
  6. Step 6: Final answer
    x = 117,296,234.10

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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.