Home / 100,812.06-139,121.15-55,494.59

Finding the Fourth Proportional to 100,812.06, 139,121.15 and 55,494.59

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Solution

The fourth proportional to 100,812.06, 139,121.15 and 55,494.59 is: 76,582.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,812.06 : 139,121.15 = 55,494.59 : x
  2. Step 2: Convert to fraction form
    100,812.06/139,121.15 = 55,494.59/x
  3. Step 3: Cross multiply
    100,812.06x = 139,121.15 × 55,494.59
  4. Step 4: Simplify right side
    100,812.06x = 7,720,470,206.50
  5. Step 5: Solve for x
    x = 7,720,470,206.50/100,812.06
  6. Step 6: Final answer
    x = 76,582.80

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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.