Home / 128,969.12-177,977.27-75,243.74

Finding the Fourth Proportional to 128,969.12, 177,977.27 and 75,243.74

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Solution

The fourth proportional to 128,969.12, 177,977.27 and 75,243.74 is: 103,836.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,969.12 : 177,977.27 = 75,243.74 : x
  2. Step 2: Convert to fraction form
    128,969.12/177,977.27 = 75,243.74/x
  3. Step 3: Cross multiply
    128,969.12x = 177,977.27 × 75,243.74
  4. Step 4: Simplify right side
    128,969.12x = 13,391,674,163.68
  5. Step 5: Solve for x
    x = 13,391,674,163.68/128,969.12
  6. Step 6: Final answer
    x = 103,836.29

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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.