Home / 101,102.04-139,519.91-55,780.43

Finding the Fourth Proportional to 101,102.04, 139,519.91 and 55,780.43

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Solution

The fourth proportional to 101,102.04, 139,519.91 and 55,780.43 is: 76,976.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,102.04 : 139,519.91 = 55,780.43 : x
  2. Step 2: Convert to fraction form
    101,102.04/139,519.91 = 55,780.43/x
  3. Step 3: Cross multiply
    101,102.04x = 139,519.91 × 55,780.43
  4. Step 4: Simplify right side
    101,102.04x = 7,782,480,015.21
  5. Step 5: Solve for x
    x = 7,782,480,015.21/101,102.04
  6. Step 6: Final answer
    x = 76,976.49

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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.