Home / 120,257.94-165,944.65-81,416.76

Finding the Fourth Proportional to 120,257.94, 165,944.65 and 81,416.76

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Solution

The fourth proportional to 120,257.94, 165,944.65 and 81,416.76 is: 112,347.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,257.94 : 165,944.65 = 81,416.76 : x
  2. Step 2: Convert to fraction form
    120,257.94/165,944.65 = 81,416.76/x
  3. Step 3: Cross multiply
    120,257.94x = 165,944.65 × 81,416.76
  4. Step 4: Simplify right side
    120,257.94x = 13,510,675,742.33
  5. Step 5: Solve for x
    x = 13,510,675,742.33/120,257.94
  6. Step 6: Final answer
    x = 112,347.47

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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.