Home / 278,072.36-417,212.78-128,384.36

Finding the Fourth Proportional to 278,072.36, 417,212.78 and 128,384.36

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Solution

The fourth proportional to 278,072.36, 417,212.78 and 128,384.36 is: 192,624.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,072.36 : 417,212.78 = 128,384.36 : x
  2. Step 2: Convert to fraction form
    278,072.36/417,212.78 = 128,384.36/x
  3. Step 3: Cross multiply
    278,072.36x = 417,212.78 × 128,384.36
  4. Step 4: Simplify right side
    278,072.36x = 53,563,595,744.12
  5. Step 5: Solve for x
    x = 53,563,595,744.12/278,072.36
  6. Step 6: Final answer
    x = 192,624.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.