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Finding the Fourth Proportional to 121,907.80, 182,861.70 and 120,158.20

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Solution

The fourth proportional to 121,907.80, 182,861.70 and 120,158.20 is: 180,237.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,907.80 : 182,861.70 = 120,158.20 : x
  2. Step 2: Convert to fraction form
    121,907.80/182,861.70 = 120,158.20/x
  3. Step 3: Cross multiply
    121,907.80x = 182,861.70 × 120,158.20
  4. Step 4: Simplify right side
    121,907.80x = 21,972,332,720.94
  5. Step 5: Solve for x
    x = 21,972,332,720.94/121,907.80
  6. Step 6: Final answer
    x = 180,237.30

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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.