Home / 121,863.38-168,194.71-81,647.27

Finding the Fourth Proportional to 121,863.38, 168,194.71 and 81,647.27

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Solution

The fourth proportional to 121,863.38, 168,194.71 and 81,647.27 is: 112,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,863.38 : 168,194.71 = 81,647.27 : x
  2. Step 2: Convert to fraction form
    121,863.38/168,194.71 = 81,647.27/x
  3. Step 3: Cross multiply
    121,863.38x = 168,194.71 × 81,647.27
  4. Step 4: Simplify right side
    121,863.38x = 13,732,638,058.97
  5. Step 5: Solve for x
    x = 13,732,638,058.97/121,863.38
  6. Step 6: Final answer
    x = 112,688.80

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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.