Home / 81,742.54-122,547.64-25,553.72

Finding the Fourth Proportional to 81,742.54, 122,547.64 and 25,553.72

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Solution

The fourth proportional to 81,742.54, 122,547.64 and 25,553.72 is: 38,309.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,742.54 : 122,547.64 = 25,553.72 : x
  2. Step 2: Convert to fraction form
    81,742.54/122,547.64 = 25,553.72/x
  3. Step 3: Cross multiply
    81,742.54x = 122,547.64 × 25,553.72
  4. Step 4: Simplify right side
    81,742.54x = 3,131,548,079.22
  5. Step 5: Solve for x
    x = 3,131,548,079.22/81,742.54
  6. Step 6: Final answer
    x = 38,309.89

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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.