Home / 78,431.43-117,581.43-54,669.27

Finding the Fourth Proportional to 78,431.43, 117,581.43 and 54,669.27

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Solution

The fourth proportional to 78,431.43, 117,581.43 and 54,669.27 is: 81,958.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,431.43 : 117,581.43 = 54,669.27 : x
  2. Step 2: Convert to fraction form
    78,431.43/117,581.43 = 54,669.27/x
  3. Step 3: Cross multiply
    78,431.43x = 117,581.43 × 54,669.27
  4. Step 4: Simplify right side
    78,431.43x = 6,428,090,943.66
  5. Step 5: Solve for x
    x = 6,428,090,943.66/78,431.43
  6. Step 6: Final answer
    x = 81,958.10

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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.