Home / 100,954.10-139,314.78-55,636.28

Finding the Fourth Proportional to 100,954.10, 139,314.78 and 55,636.28

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Solution

The fourth proportional to 100,954.10, 139,314.78 and 55,636.28 is: 76,777.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,954.10 : 139,314.78 = 55,636.28 : x
  2. Step 2: Convert to fraction form
    100,954.10/139,314.78 = 55,636.28/x
  3. Step 3: Cross multiply
    100,954.10x = 139,314.78 × 55,636.28
  4. Step 4: Simplify right side
    100,954.10x = 7,750,956,108.22
  5. Step 5: Solve for x
    x = 7,750,956,108.22/100,954.10
  6. Step 6: Final answer
    x = 76,777.03

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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.