Home / 105,721.36-145,894.20-57,974.32

Finding the Fourth Proportional to 105,721.36, 145,894.20 and 57,974.32

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Solution

The fourth proportional to 105,721.36, 145,894.20 and 57,974.32 is: 80,003.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,721.36 : 145,894.20 = 57,974.32 : x
  2. Step 2: Convert to fraction form
    105,721.36/145,894.20 = 57,974.32/x
  3. Step 3: Cross multiply
    105,721.36x = 145,894.20 × 57,974.32
  4. Step 4: Simplify right side
    105,721.36x = 8,458,117,036.94
  5. Step 5: Solve for x
    x = 8,458,117,036.94/105,721.36
  6. Step 6: Final answer
    x = 80,003.86

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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.