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Finding the Fourth Proportional to 120,900.60, 181,307.70 and 54,372.60

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Solution

The fourth proportional to 120,900.60, 181,307.70 and 54,372.60 is: 81,539.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,900.60 : 181,307.70 = 54,372.60 : x
  2. Step 2: Convert to fraction form
    120,900.60/181,307.70 = 54,372.60/x
  3. Step 3: Cross multiply
    120,900.60x = 181,307.70 × 54,372.60
  4. Step 4: Simplify right side
    120,900.60x = 9,858,171,049.02
  5. Step 5: Solve for x
    x = 9,858,171,049.02/120,900.60
  6. Step 6: Final answer
    x = 81,539.47

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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.