Home / 105,721.29-145,896.30-57,974.22

Finding the Fourth Proportional to 105,721.29, 145,896.30 and 57,974.22

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Solution

The fourth proportional to 105,721.29, 145,896.30 and 57,974.22 is: 80,004.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,721.29 : 145,896.30 = 57,974.22 : x
  2. Step 2: Convert to fraction form
    105,721.29/145,896.30 = 57,974.22/x
  3. Step 3: Cross multiply
    105,721.29x = 145,896.30 × 57,974.22
  4. Step 4: Simplify right side
    105,721.29x = 8,458,224,193.39
  5. Step 5: Solve for x
    x = 8,458,224,193.39/105,721.29
  6. Step 6: Final answer
    x = 80,004.93

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1.5x scale

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.