Home / 128,923.99-177,912.31-71,559.96

Finding the Fourth Proportional to 128,923.99, 177,912.31 and 71,559.96

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Solution

The fourth proportional to 128,923.99, 177,912.31 and 71,559.96 is: 98,751.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.99 : 177,912.31 = 71,559.96 : x
  2. Step 2: Convert to fraction form
    128,923.99/177,912.31 = 71,559.96/x
  3. Step 3: Cross multiply
    128,923.99x = 177,912.31 × 71,559.96
  4. Step 4: Simplify right side
    128,923.99x = 12,731,397,787.11
  5. Step 5: Solve for x
    x = 12,731,397,787.11/128,923.99
  6. Step 6: Final answer
    x = 98,751.19

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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.