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Finding the Fourth Proportional to 139,517.80, 209,276.70 and 92,278.60

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Solution

The fourth proportional to 139,517.80, 209,276.70 and 92,278.60 is: 138,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,517.80 : 209,276.70 = 92,278.60 : x
  2. Step 2: Convert to fraction form
    139,517.80/209,276.70 = 92,278.60/x
  3. Step 3: Cross multiply
    139,517.80x = 209,276.70 × 92,278.60
  4. Step 4: Simplify right side
    139,517.80x = 19,311,760,888.62
  5. Step 5: Solve for x
    x = 19,311,760,888.62/139,517.80
  6. Step 6: Final answer
    x = 138,417.90

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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.