Home / 101,178.05-139,635.21-75,640.19

Finding the Fourth Proportional to 101,178.05, 139,635.21 and 75,640.19

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Solution

The fourth proportional to 101,178.05, 139,635.21 and 75,640.19 is: 104,390.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,178.05 : 139,635.21 = 75,640.19 : x
  2. Step 2: Convert to fraction form
    101,178.05/139,635.21 = 75,640.19/x
  3. Step 3: Cross multiply
    101,178.05x = 139,635.21 × 75,640.19
  4. Step 4: Simplify right side
    101,178.05x = 10,562,034,447.83
  5. Step 5: Solve for x
    x = 10,562,034,447.83/101,178.05
  6. Step 6: Final answer
    x = 104,390.57

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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.