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Finding the Fourth Proportional to 281,921.60, 422,901.60 and 89,780.80

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Solution

The fourth proportional to 281,921.60, 422,901.60 and 89,780.80 is: 134,677.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,921.60 : 422,901.60 = 89,780.80 : x
  2. Step 2: Convert to fraction form
    281,921.60/422,901.60 = 89,780.80/x
  3. Step 3: Cross multiply
    281,921.60x = 422,901.60 × 89,780.80
  4. Step 4: Simplify right side
    281,921.60x = 37,968,443,969.28
  5. Step 5: Solve for x
    x = 37,968,443,969.28/281,921.60
  6. Step 6: Final answer
    x = 134,677.31

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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.