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Finding the Fourth Proportional to 149,280.87, 206,007.78 and 81,297.96

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Solution

The fourth proportional to 149,280.87, 206,007.78 and 81,297.96 is: 112,191.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,280.87 : 206,007.78 = 81,297.96 : x
  2. Step 2: Convert to fraction form
    149,280.87/206,007.78 = 81,297.96/x
  3. Step 3: Cross multiply
    149,280.87x = 206,007.78 × 81,297.96
  4. Step 4: Simplify right side
    149,280.87x = 16,748,012,258.13
  5. Step 5: Solve for x
    x = 16,748,012,258.13/149,280.87
  6. Step 6: Final answer
    x = 112,191.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.