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Finding the Fourth Proportional to 121,808.80, 182,713.20 and 120,059.20

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Solution

The fourth proportional to 121,808.80, 182,713.20 and 120,059.20 is: 180,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,808.80 : 182,713.20 = 120,059.20 : x
  2. Step 2: Convert to fraction form
    121,808.80/182,713.20 = 120,059.20/x
  3. Step 3: Cross multiply
    121,808.80x = 182,713.20 × 120,059.20
  4. Step 4: Simplify right side
    121,808.80x = 21,936,400,621.44
  5. Step 5: Solve for x
    x = 21,936,400,621.44/121,808.80
  6. Step 6: Final answer
    x = 180,088.80

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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.