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Finding the Fourth Proportional to 120,627.80, 180,941.70 and 76,304.60

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Solution

The fourth proportional to 120,627.80, 180,941.70 and 76,304.60 is: 114,456.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,627.80 : 180,941.70 = 76,304.60 : x
  2. Step 2: Convert to fraction form
    120,627.80/180,941.70 = 76,304.60/x
  3. Step 3: Cross multiply
    120,627.80x = 180,941.70 × 76,304.60
  4. Step 4: Simplify right side
    120,627.80x = 13,806,684,041.82
  5. Step 5: Solve for x
    x = 13,806,684,041.82/120,627.80
  6. Step 6: Final answer
    x = 114,456.90

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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.