Home / 105,536.77-145,640.97-57,139.22

Finding the Fourth Proportional to 105,536.77, 145,640.97 and 57,139.22

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Solution

The fourth proportional to 105,536.77, 145,640.97 and 57,139.22 is: 78,852.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,536.77 : 145,640.97 = 57,139.22 : x
  2. Step 2: Convert to fraction form
    105,536.77/145,640.97 = 57,139.22/x
  3. Step 3: Cross multiply
    105,536.77x = 145,640.97 × 57,139.22
  4. Step 4: Simplify right side
    105,536.77x = 8,321,811,425.84
  5. Step 5: Solve for x
    x = 8,321,811,425.84/105,536.77
  6. Step 6: Final answer
    x = 78,852.25

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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.