Home / 281,639.36-422,478.48-81,961.40

Finding the Fourth Proportional to 281,639.36, 422,478.48 and 81,961.40

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Solution

The fourth proportional to 281,639.36, 422,478.48 and 81,961.40 is: 122,947.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,639.36 : 422,478.48 = 81,961.40 : x
  2. Step 2: Convert to fraction form
    281,639.36/422,478.48 = 81,961.40/x
  3. Step 3: Cross multiply
    281,639.36x = 422,478.48 × 81,961.40
  4. Step 4: Simplify right side
    281,639.36x = 34,626,927,690.67
  5. Step 5: Solve for x
    x = 34,626,927,690.67/281,639.36
  6. Step 6: Final answer
    x = 122,947.76

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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.