Home / 120,330.98-180,299.19-85,207.58

Finding the Fourth Proportional to 120,330.98, 180,299.19 and 85,207.58

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Solution

The fourth proportional to 120,330.98, 180,299.19 and 85,207.58 is: 127,671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,330.98 : 180,299.19 = 85,207.58 : x
  2. Step 2: Convert to fraction form
    120,330.98/180,299.19 = 85,207.58/x
  3. Step 3: Cross multiply
    120,330.98x = 180,299.19 × 85,207.58
  4. Step 4: Simplify right side
    120,330.98x = 15,362,857,655.86
  5. Step 5: Solve for x
    x = 15,362,857,655.86/120,330.98
  6. Step 6: Final answer
    x = 127,671.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.