Home / 120,256.94-165,943.28-81,415.76

Finding the Fourth Proportional to 120,256.94, 165,943.28 and 81,415.76

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Solution

The fourth proportional to 120,256.94, 165,943.28 and 81,415.76 is: 112,346.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,256.94 : 165,943.28 = 81,415.76 : x
  2. Step 2: Convert to fraction form
    120,256.94/165,943.28 = 81,415.76/x
  3. Step 3: Cross multiply
    120,256.94x = 165,943.28 × 81,415.76
  4. Step 4: Simplify right side
    120,256.94x = 13,510,397,021.30
  5. Step 5: Solve for x
    x = 13,510,397,021.30/120,256.94
  6. Step 6: Final answer
    x = 112,346.09

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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.