Home / 100,986.33-139,362.11-55,666.06

Finding the Fourth Proportional to 100,986.33, 139,362.11 and 55,666.06

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Solution

The fourth proportional to 100,986.33, 139,362.11 and 55,666.06 is: 76,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.33 : 139,362.11 = 55,666.06 : x
  2. Step 2: Convert to fraction form
    100,986.33/139,362.11 = 55,666.06/x
  3. Step 3: Cross multiply
    100,986.33x = 139,362.11 × 55,666.06
  4. Step 4: Simplify right side
    100,986.33x = 7,757,739,576.99
  5. Step 5: Solve for x
    x = 7,757,739,576.99/100,986.33
  6. Step 6: Final answer
    x = 76,819.70

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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.