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Finding the Fourth Proportional to 120,054.70, 180,519.45 and 100,809.10

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Solution

The fourth proportional to 120,054.70, 180,519.45 and 100,809.10 is: 151,580.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,054.70 : 180,519.45 = 100,809.10 : x
  2. Step 2: Convert to fraction form
    120,054.70/180,519.45 = 100,809.10/x
  3. Step 3: Cross multiply
    120,054.70x = 180,519.45 × 100,809.10
  4. Step 4: Simplify right side
    120,054.70x = 18,198,003,287.00
  5. Step 5: Solve for x
    x = 18,198,003,287.00/120,054.70
  6. Step 6: Final answer
    x = 151,580.93

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1.5x scale

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.