Home / 128,406.20-177,213.81-73,960.17

Finding the Fourth Proportional to 128,406.20, 177,213.81 and 73,960.17

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Solution

The fourth proportional to 128,406.20, 177,213.81 and 73,960.17 is: 102,072.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,406.20 : 177,213.81 = 73,960.17 : x
  2. Step 2: Convert to fraction form
    128,406.20/177,213.81 = 73,960.17/x
  3. Step 3: Cross multiply
    128,406.20x = 177,213.81 × 73,960.17
  4. Step 4: Simplify right side
    128,406.20x = 13,106,763,513.95
  5. Step 5: Solve for x
    x = 13,106,763,513.95/128,406.20
  6. Step 6: Final answer
    x = 102,072.67

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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.