Home / 81,128.54-121,673.90-21,968.82

Finding the Fourth Proportional to 81,128.54, 121,673.90 and 21,968.82

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Solution

The fourth proportional to 81,128.54, 121,673.90 and 21,968.82 is: 32,948.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128.54 : 121,673.90 = 21,968.82 : x
  2. Step 2: Convert to fraction form
    81,128.54/121,673.90 = 21,968.82/x
  3. Step 3: Cross multiply
    81,128.54x = 121,673.90 × 21,968.82
  4. Step 4: Simplify right side
    81,128.54x = 2,673,031,939.15
  5. Step 5: Solve for x
    x = 2,673,031,939.15/81,128.54
  6. Step 6: Final answer
    x = 32,948.11

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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.