Home / 128,438.06-177,252.72-71,849.84

Finding the Fourth Proportional to 128,438.06, 177,252.72 and 71,849.84

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Solution

The fourth proportional to 128,438.06, 177,252.72 and 71,849.84 is: 99,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,438.06 : 177,252.72 = 71,849.84 : x
  2. Step 2: Convert to fraction form
    128,438.06/177,252.72 = 71,849.84/x
  3. Step 3: Cross multiply
    128,438.06x = 177,252.72 × 71,849.84
  4. Step 4: Simplify right side
    128,438.06x = 12,735,579,571.56
  5. Step 5: Solve for x
    x = 12,735,579,571.56/128,438.06
  6. Step 6: Final answer
    x = 99,157.36

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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.