Home / 81,478.68-122,405.14-57,518.08

Finding the Fourth Proportional to 81,478.68, 122,405.14 and 57,518.08

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Solution

The fourth proportional to 81,478.68, 122,405.14 and 57,518.08 is: 86,409.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.68 : 122,405.14 = 57,518.08 : x
  2. Step 2: Convert to fraction form
    81,478.68/122,405.14 = 57,518.08/x
  3. Step 3: Cross multiply
    81,478.68x = 122,405.14 × 57,518.08
  4. Step 4: Simplify right side
    81,478.68x = 7,040,508,634.93
  5. Step 5: Solve for x
    x = 7,040,508,634.93/81,478.68
  6. Step 6: Final answer
    x = 86,409.21

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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.