Home / 120,257.06-165,943.45-81,415.88

Finding the Fourth Proportional to 120,257.06, 165,943.45 and 81,415.88

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Solution

The fourth proportional to 120,257.06, 165,943.45 and 81,415.88 is: 112,346.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,257.06 : 165,943.45 = 81,415.88 : x
  2. Step 2: Convert to fraction form
    120,257.06/165,943.45 = 81,415.88/x
  3. Step 3: Cross multiply
    120,257.06x = 165,943.45 × 81,415.88
  4. Step 4: Simplify right side
    120,257.06x = 13,510,432,011.99
  5. Step 5: Solve for x
    x = 13,510,432,011.99/120,257.06
  6. Step 6: Final answer
    x = 112,346.27

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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.