Home / 105,255.09-145,261.89-57,515.54

Finding the Fourth Proportional to 105,255.09, 145,261.89 and 57,515.54

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Solution

The fourth proportional to 105,255.09, 145,261.89 and 57,515.54 is: 79,376.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,255.09 : 145,261.89 = 57,515.54 : x
  2. Step 2: Convert to fraction form
    105,255.09/145,261.89 = 57,515.54/x
  3. Step 3: Cross multiply
    105,255.09x = 145,261.89 × 57,515.54
  4. Step 4: Simplify right side
    105,255.09x = 8,354,815,318.46
  5. Step 5: Solve for x
    x = 8,354,815,318.46/105,255.09
  6. Step 6: Final answer
    x = 79,376.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.