Home / 81,045.73-121,584.36-31,122.16

Finding the Fourth Proportional to 81,045.73, 121,584.36 and 31,122.16

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Solution

The fourth proportional to 81,045.73, 121,584.36 and 31,122.16 is: 46,689.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.73 : 121,584.36 = 31,122.16 : x
  2. Step 2: Convert to fraction form
    81,045.73/121,584.36 = 31,122.16/x
  3. Step 3: Cross multiply
    81,045.73x = 121,584.36 × 31,122.16
  4. Step 4: Simplify right side
    81,045.73x = 3,783,967,749.81
  5. Step 5: Solve for x
    x = 3,783,967,749.81/81,045.73
  6. Step 6: Final answer
    x = 46,689.29

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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.