Home / 129,509,693.20-194,012,597.40-78,239,414.80

Finding the Fourth Proportional to 129,509,693.20, 194,012,597.40 and 78,239,414.80

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Solution

The fourth proportional to 129,509,693.20, 194,012,597.40 and 78,239,414.80 is: 117,206,918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,509,693.20 : 194,012,597.40 = 78,239,414.80 : x
  2. Step 2: Convert to fraction form
    129,509,693.20/194,012,597.40 = 78,239,414.80/x
  3. Step 3: Cross multiply
    129,509,693.20x = 194,012,597.40 × 78,239,414.80
  4. Step 4: Simplify right side
    129,509,693.20x = 15,179,432,084,404,002
  5. Step 5: Solve for x
    x = 15,179,432,084,404,002/129,509,693.20
  6. Step 6: Final answer
    x = 117,206,918.72

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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.