Home / 129,458,705.20-194,188,057.80-81,085,764.40

Finding the Fourth Proportional to 129,458,705.20, 194,188,057.80 and 81,085,764.40

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Solution

The fourth proportional to 129,458,705.20, 194,188,057.80 and 81,085,764.40 is: 121,628,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,458,705.20 : 194,188,057.80 = 81,085,764.40 : x
  2. Step 2: Convert to fraction form
    129,458,705.20/194,188,057.80 = 81,085,764.40/x
  3. Step 3: Cross multiply
    129,458,705.20x = 194,188,057.80 × 81,085,764.40
  4. Step 4: Simplify right side
    129,458,705.20x = 15,745,887,104,064,384
  5. Step 5: Solve for x
    x = 15,745,887,104,064,384/129,458,705.20
  6. Step 6: Final answer
    x = 121,628,646.60

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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.