Home / 128,846,109.12-177,739,872-76,597,984.32

Finding the Fourth Proportional to 128,846,109.12, 177,739,872 and 76,597,984.32

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Solution

The fourth proportional to 128,846,109.12, 177,739,872 and 76,597,984.32 is: 105,664,936.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,846,109.12 : 177,739,872 = 76,597,984.32 : x
  2. Step 2: Convert to fraction form
    128,846,109.12/177,739,872 = 76,597,984.32/x
  3. Step 3: Cross multiply
    128,846,109.12x = 177,739,872 × 76,597,984.32
  4. Step 4: Simplify right side
    128,846,109.12x = 13,614,515,928,494,806
  5. Step 5: Solve for x
    x = 13,614,515,928,494,806/128,846,109.12
  6. Step 6: Final answer
    x = 105,664,936.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.