Home / 105,686.09-145,845.13-57,939.77

Finding the Fourth Proportional to 105,686.09, 145,845.13 and 57,939.77

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Solution

The fourth proportional to 105,686.09, 145,845.13 and 57,939.77 is: 79,955.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,686.09 : 145,845.13 = 57,939.77 : x
  2. Step 2: Convert to fraction form
    105,686.09/145,845.13 = 57,939.77/x
  3. Step 3: Cross multiply
    105,686.09x = 145,845.13 × 57,939.77
  4. Step 4: Simplify right side
    105,686.09x = 8,450,232,268.90
  5. Step 5: Solve for x
    x = 8,450,232,268.90/105,686.09
  6. Step 6: Final answer
    x = 79,955.96

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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.