Home / 78,120.09-107,725.10-66,826.96

Finding the Fourth Proportional to 78,120.09, 107,725.10 and 66,826.96

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Solution

The fourth proportional to 78,120.09, 107,725.10 and 66,826.96 is: 92,152.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.09 : 107,725.10 = 66,826.96 : x
  2. Step 2: Convert to fraction form
    78,120.09/107,725.10 = 66,826.96/x
  3. Step 3: Cross multiply
    78,120.09x = 107,725.10 × 66,826.96
  4. Step 4: Simplify right side
    78,120.09x = 7,198,940,345.25
  5. Step 5: Solve for x
    x = 7,198,940,345.25/78,120.09
  6. Step 6: Final answer
    x = 92,152.23

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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.