Home / 120,310.30-180,465.45-109,812.70

Finding the Fourth Proportional to 120,310.30, 180,465.45 and 109,812.70

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Solution

The fourth proportional to 120,310.30, 180,465.45 and 109,812.70 is: 164,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,310.30 : 180,465.45 = 109,812.70 : x
  2. Step 2: Convert to fraction form
    120,310.30/180,465.45 = 109,812.70/x
  3. Step 3: Cross multiply
    120,310.30x = 180,465.45 × 109,812.70
  4. Step 4: Simplify right side
    120,310.30x = 19,817,398,321.22
  5. Step 5: Solve for x
    x = 19,817,398,321.22/120,310.30
  6. Step 6: Final answer
    x = 164,719.05

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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.