Home / 105,531.92-145,634.29-57,134.36

Finding the Fourth Proportional to 105,531.92, 145,634.29 and 57,134.36

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Solution

The fourth proportional to 105,531.92, 145,634.29 and 57,134.36 is: 78,845.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,531.92 : 145,634.29 = 57,134.36 : x
  2. Step 2: Convert to fraction form
    105,531.92/145,634.29 = 57,134.36/x
  3. Step 3: Cross multiply
    105,531.92x = 145,634.29 × 57,134.36
  4. Step 4: Simplify right side
    105,531.92x = 8,320,721,801.10
  5. Step 5: Solve for x
    x = 8,320,721,801.10/105,531.92
  6. Step 6: Final answer
    x = 78,845.54

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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.