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Finding the Fourth Proportional to 51,166, 70,611.21 and 28,505

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Solution

The fourth proportional to 51,166, 70,611.21 and 28,505 is: 39,338.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,166 : 70,611.21 = 28,505 : x
  2. Step 2: Convert to fraction form
    51,166/70,611.21 = 28,505/x
  3. Step 3: Cross multiply
    51,166x = 70,611.21 × 28,505
  4. Step 4: Simplify right side
    51,166x = 2,012,772,541.05
  5. Step 5: Solve for x
    x = 2,012,772,541.05/51,166
  6. Step 6: Final answer
    x = 39,338.09

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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.