Home / 81,735.11-122,599.33-28,439.29

Finding the Fourth Proportional to 81,735.11, 122,599.33 and 28,439.29

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Solution

The fourth proportional to 81,735.11, 122,599.33 and 28,439.29 is: 42,657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,735.11 : 122,599.33 = 28,439.29 : x
  2. Step 2: Convert to fraction form
    81,735.11/122,599.33 = 28,439.29/x
  3. Step 3: Cross multiply
    81,735.11x = 122,599.33 × 28,439.29
  4. Step 4: Simplify right side
    81,735.11x = 3,486,637,899.68
  5. Step 5: Solve for x
    x = 3,486,637,899.68/81,735.11
  6. Step 6: Final answer
    x = 42,657.77

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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.