Home / 128,441.36-177,222.53-88,140.42

Finding the Fourth Proportional to 128,441.36, 177,222.53 and 88,140.42

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Solution

The fourth proportional to 128,441.36, 177,222.53 and 88,140.42 is: 121,615.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,441.36 : 177,222.53 = 88,140.42 : x
  2. Step 2: Convert to fraction form
    128,441.36/177,222.53 = 88,140.42/x
  3. Step 3: Cross multiply
    128,441.36x = 177,222.53 × 88,140.42
  4. Step 4: Simplify right side
    128,441.36x = 15,620,468,448.01
  5. Step 5: Solve for x
    x = 15,620,468,448.01/128,441.36
  6. Step 6: Final answer
    x = 121,615.56

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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.