Home / 120,256.44-165,942.59-81,415.25

Finding the Fourth Proportional to 120,256.44, 165,942.59 and 81,415.25

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Solution

The fourth proportional to 120,256.44, 165,942.59 and 81,415.25 is: 112,345.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,256.44 : 165,942.59 = 81,415.25 : x
  2. Step 2: Convert to fraction form
    120,256.44/165,942.59 = 81,415.25/x
  3. Step 3: Cross multiply
    120,256.44x = 165,942.59 × 81,415.25
  4. Step 4: Simplify right side
    120,256.44x = 13,510,257,458.28
  5. Step 5: Solve for x
    x = 13,510,257,458.28/120,256.44
  6. Step 6: Final answer
    x = 112,345.40

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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.