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Finding the Fourth Proportional to 105,720.66, 145,894.37 and 57,974.00

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Solution

The fourth proportional to 105,720.66, 145,894.37 and 57,974.00 is: 80,004.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,720.66 : 145,894.37 = 57,974.00 : x
  2. Step 2: Convert to fraction form
    105,720.66/145,894.37 = 57,974.00/x
  3. Step 3: Cross multiply
    105,720.66x = 145,894.37 × 57,974.00
  4. Step 4: Simplify right side
    105,720.66x = 8,458,079,187.04
  5. Step 5: Solve for x
    x = 8,458,079,187.04/105,720.66
  6. Step 6: Final answer
    x = 80,004.03

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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.