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Finding the Fourth Proportional to 120,012.60, 179,630.10 and 85,020.60

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Solution

The fourth proportional to 120,012.60, 179,630.10 and 85,020.60 is: 127,255.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,012.60 : 179,630.10 = 85,020.60 : x
  2. Step 2: Convert to fraction form
    120,012.60/179,630.10 = 85,020.60/x
  3. Step 3: Cross multiply
    120,012.60x = 179,630.10 × 85,020.60
  4. Step 4: Simplify right side
    120,012.60x = 15,272,258,880.06
  5. Step 5: Solve for x
    x = 15,272,258,880.06/120,012.60
  6. Step 6: Final answer
    x = 127,255.46

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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.