Home / 99,761.26-137,558.91-81,555.16

Finding the Fourth Proportional to 99,761.26, 137,558.91 and 81,555.16

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Solution

The fourth proportional to 99,761.26, 137,558.91 and 81,555.16 is: 112,454.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,761.26 : 137,558.91 = 81,555.16 : x
  2. Step 2: Convert to fraction form
    99,761.26/137,558.91 = 81,555.16/x
  3. Step 3: Cross multiply
    99,761.26x = 137,558.91 × 81,555.16
  4. Step 4: Simplify right side
    99,761.26x = 11,218,638,914.48
  5. Step 5: Solve for x
    x = 11,218,638,914.48/99,761.26
  6. Step 6: Final answer
    x = 112,454.86

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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.