Home / 213,629.28-320,445-55,858.08

Finding the Fourth Proportional to 213,629.28, 320,445 and 55,858.08

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Solution

The fourth proportional to 213,629.28, 320,445 and 55,858.08 is: 83,787.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,629.28 : 320,445 = 55,858.08 : x
  2. Step 2: Convert to fraction form
    213,629.28/320,445 = 55,858.08/x
  3. Step 3: Cross multiply
    213,629.28x = 320,445 × 55,858.08
  4. Step 4: Simplify right side
    213,629.28x = 17,899,442,445.60
  5. Step 5: Solve for x
    x = 17,899,442,445.60/213,629.28
  6. Step 6: Final answer
    x = 83,787.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.