Home / 120,066.24-165,742.02-81,312.60

Finding the Fourth Proportional to 120,066.24, 165,742.02 and 81,312.60

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Solution

The fourth proportional to 120,066.24, 165,742.02 and 81,312.60 is: 112,245.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,066.24 : 165,742.02 = 81,312.60 : x
  2. Step 2: Convert to fraction form
    120,066.24/165,742.02 = 81,312.60/x
  3. Step 3: Cross multiply
    120,066.24x = 165,742.02 × 81,312.60
  4. Step 4: Simplify right side
    120,066.24x = 13,476,914,575.45
  5. Step 5: Solve for x
    x = 13,476,914,575.45/120,066.24
  6. Step 6: Final answer
    x = 112,245.66

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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.