Home / 128,295,986.19-177,194,598.89-86,971,134.03

Finding the Fourth Proportional to 128,295,986.19, 177,194,598.89 and 86,971,134.03

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Solution

The fourth proportional to 128,295,986.19, 177,194,598.89 and 86,971,134.03 is: 120,119,231.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295,986.19 : 177,194,598.89 = 86,971,134.03 : x
  2. Step 2: Convert to fraction form
    128,295,986.19/177,194,598.89 = 86,971,134.03/x
  3. Step 3: Cross multiply
    128,295,986.19x = 177,194,598.89 × 86,971,134.03
  4. Step 4: Simplify right side
    128,295,986.19x = 15,410,815,208,843,722
  5. Step 5: Solve for x
    x = 15,410,815,208,843,722/128,295,986.19
  6. Step 6: Final answer
    x = 120,119,231.06

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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.