Home / 128,914.37-177,912.54-71,559.08

Finding the Fourth Proportional to 128,914.37, 177,912.54 and 71,559.08

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Solution

The fourth proportional to 128,914.37, 177,912.54 and 71,559.08 is: 98,757.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.37 : 177,912.54 = 71,559.08 : x
  2. Step 2: Convert to fraction form
    128,914.37/177,912.54 = 71,559.08/x
  3. Step 3: Cross multiply
    128,914.37x = 177,912.54 × 71,559.08
  4. Step 4: Simplify right side
    128,914.37x = 12,731,256,793.30
  5. Step 5: Solve for x
    x = 12,731,256,793.30/128,914.37
  6. Step 6: Final answer
    x = 98,757.47

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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.