Home / 81,580.38-122,370.56-28,991.94

Finding the Fourth Proportional to 81,580.38, 122,370.56 and 28,991.94

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Solution

The fourth proportional to 81,580.38, 122,370.56 and 28,991.94 is: 43,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,580.38 : 122,370.56 = 28,991.94 : x
  2. Step 2: Convert to fraction form
    81,580.38/122,370.56 = 28,991.94/x
  3. Step 3: Cross multiply
    81,580.38x = 122,370.56 × 28,991.94
  4. Step 4: Simplify right side
    81,580.38x = 3,547,759,933.29
  5. Step 5: Solve for x
    x = 3,547,759,933.29/81,580.38
  6. Step 6: Final answer
    x = 43,487.91

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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.