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Finding the Fourth Proportional to 281,200.60, 421,800.90 and 91,660.60

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Solution

The fourth proportional to 281,200.60, 421,800.90 and 91,660.60 is: 137,490.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,200.60 : 421,800.90 = 91,660.60 : x
  2. Step 2: Convert to fraction form
    281,200.60/421,800.90 = 91,660.60/x
  3. Step 3: Cross multiply
    281,200.60x = 421,800.90 × 91,660.60
  4. Step 4: Simplify right side
    281,200.60x = 38,662,523,574.54
  5. Step 5: Solve for x
    x = 38,662,523,574.54/281,200.60
  6. Step 6: Final answer
    x = 137,490.90

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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.