Home / 120,538.06-180,837.21-85,068.61

Finding the Fourth Proportional to 120,538.06, 180,837.21 and 85,068.61

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Solution

The fourth proportional to 120,538.06, 180,837.21 and 85,068.61 is: 127,624.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,538.06 : 180,837.21 = 85,068.61 : x
  2. Step 2: Convert to fraction form
    120,538.06/180,837.21 = 85,068.61/x
  3. Step 3: Cross multiply
    120,538.06x = 180,837.21 × 85,068.61
  4. Step 4: Simplify right side
    120,538.06x = 15,383,570,090.98
  5. Step 5: Solve for x
    x = 15,383,570,090.98/120,538.06
  6. Step 6: Final answer
    x = 127,624.17

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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.