Home / 81,034.86-121,552.26-21,870.54

Finding the Fourth Proportional to 81,034.86, 121,552.26 and 21,870.54

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Solution

The fourth proportional to 81,034.86, 121,552.26 and 21,870.54 is: 32,805.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,034.86 : 121,552.26 = 21,870.54 : x
  2. Step 2: Convert to fraction form
    81,034.86/121,552.26 = 21,870.54/x
  3. Step 3: Cross multiply
    81,034.86x = 121,552.26 × 21,870.54
  4. Step 4: Simplify right side
    81,034.86x = 2,658,413,564.42
  5. Step 5: Solve for x
    x = 2,658,413,564.42/81,034.86
  6. Step 6: Final answer
    x = 32,805.80

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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.