Home / 100,881.10-139,215.27-55,556.74

Finding the Fourth Proportional to 100,881.10, 139,215.27 and 55,556.74

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Solution

The fourth proportional to 100,881.10, 139,215.27 and 55,556.74 is: 76,667.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,881.10 : 139,215.27 = 55,556.74 : x
  2. Step 2: Convert to fraction form
    100,881.10/139,215.27 = 55,556.74/x
  3. Step 3: Cross multiply
    100,881.10x = 139,215.27 × 55,556.74
  4. Step 4: Simplify right side
    100,881.10x = 7,734,346,559.42
  5. Step 5: Solve for x
    x = 7,734,346,559.42/100,881.10
  6. Step 6: Final answer
    x = 76,667.94

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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.