Home / 101,121.57-139,542.32-55,790.67

Finding the Fourth Proportional to 101,121.57, 139,542.32 and 55,790.67

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Solution

The fourth proportional to 101,121.57, 139,542.32 and 55,790.67 is: 76,988.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,121.57 : 139,542.32 = 55,790.67 : x
  2. Step 2: Convert to fraction form
    101,121.57/139,542.32 = 55,790.67/x
  3. Step 3: Cross multiply
    101,121.57x = 139,542.32 × 55,790.67
  4. Step 4: Simplify right side
    101,121.57x = 7,785,159,247.20
  5. Step 5: Solve for x
    x = 7,785,159,247.20/101,121.57
  6. Step 6: Final answer
    x = 76,988.12

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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.