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Finding the Fourth Proportional to 120,841.20, 181,261.80 and 54,313.20

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Solution

The fourth proportional to 120,841.20, 181,261.80 and 54,313.20 is: 81,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,841.20 : 181,261.80 = 54,313.20 : x
  2. Step 2: Convert to fraction form
    120,841.20/181,261.80 = 54,313.20/x
  3. Step 3: Cross multiply
    120,841.20x = 181,261.80 × 54,313.20
  4. Step 4: Simplify right side
    120,841.20x = 9,844,908,395.76
  5. Step 5: Solve for x
    x = 9,844,908,395.76/120,841.20
  6. Step 6: Final answer
    x = 81,469.80

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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.