Home / 128,429.28-177,245.76-73,983.36

Finding the Fourth Proportional to 128,429.28, 177,245.76 and 73,983.36

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Solution

The fourth proportional to 128,429.28, 177,245.76 and 73,983.36 is: 102,104.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.28 : 177,245.76 = 73,983.36 : x
  2. Step 2: Convert to fraction form
    128,429.28/177,245.76 = 73,983.36/x
  3. Step 3: Cross multiply
    128,429.28x = 177,245.76 × 73,983.36
  4. Step 4: Simplify right side
    128,429.28x = 13,113,236,870.55
  5. Step 5: Solve for x
    x = 13,113,236,870.55/128,429.28
  6. Step 6: Final answer
    x = 102,104.73

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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.