Home / 128,914.49-177,912.72-71,559.20

Finding the Fourth Proportional to 128,914.49, 177,912.72 and 71,559.20

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Solution

The fourth proportional to 128,914.49, 177,912.72 and 71,559.20 is: 98,757.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.49 : 177,912.72 = 71,559.20 : x
  2. Step 2: Convert to fraction form
    128,914.49/177,912.72 = 71,559.20/x
  3. Step 3: Cross multiply
    128,914.49x = 177,912.72 × 71,559.20
  4. Step 4: Simplify right side
    128,914.49x = 12,731,291,555.23
  5. Step 5: Solve for x
    x = 12,731,291,555.23/128,914.49
  6. Step 6: Final answer
    x = 98,757.65

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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.