Home / 120,071.18-165,604.82-85,129.76

Finding the Fourth Proportional to 120,071.18, 165,604.82 and 85,129.76

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Solution

The fourth proportional to 120,071.18, 165,604.82 and 85,129.76 is: 117,412.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,071.18 : 165,604.82 = 85,129.76 : x
  2. Step 2: Convert to fraction form
    120,071.18/165,604.82 = 85,129.76/x
  3. Step 3: Cross multiply
    120,071.18x = 165,604.82 × 85,129.76
  4. Step 4: Simplify right side
    120,071.18x = 14,097,898,581.44
  5. Step 5: Solve for x
    x = 14,097,898,581.44/120,071.18
  6. Step 6: Final answer
    x = 117,412.84

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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.