Home / 85,451,623.45-128,177,436.69-20,754,992.51

Finding the Fourth Proportional to 85,451,623.45, 128,177,436.69 and 20,754,992.51

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Solution

The fourth proportional to 85,451,623.45, 128,177,436.69 and 20,754,992.51 is: 31,132,489.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451,623.45 : 128,177,436.69 = 20,754,992.51 : x
  2. Step 2: Convert to fraction form
    85,451,623.45/128,177,436.69 = 20,754,992.51/x
  3. Step 3: Cross multiply
    85,451,623.45x = 128,177,436.69 × 20,754,992.51
  4. Step 4: Simplify right side
    85,451,623.45x = 2,660,321,738,291,727
  5. Step 5: Solve for x
    x = 2,660,321,738,291,727/85,451,623.45
  6. Step 6: Final answer
    x = 31,132,489.13

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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.