Home / 100,851.09-139,173.33-55,528.11

Finding the Fourth Proportional to 100,851.09, 139,173.33 and 55,528.11

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Solution

The fourth proportional to 100,851.09, 139,173.33 and 55,528.11 is: 76,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,851.09 : 139,173.33 = 55,528.11 : x
  2. Step 2: Convert to fraction form
    100,851.09/139,173.33 = 55,528.11/x
  3. Step 3: Cross multiply
    100,851.09x = 139,173.33 × 55,528.11
  4. Step 4: Simplify right side
    100,851.09x = 7,728,031,977.31
  5. Step 5: Solve for x
    x = 7,728,031,977.31/100,851.09
  6. Step 6: Final answer
    x = 76,628.15

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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.