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Finding the Fourth Proportional to 43,151.78, 64,734.64 and 12,759.99

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Solution

The fourth proportional to 43,151.78, 64,734.64 and 12,759.99 is: 19,142.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,151.78 : 64,734.64 = 12,759.99 : x
  2. Step 2: Convert to fraction form
    43,151.78/64,734.64 = 12,759.99/x
  3. Step 3: Cross multiply
    43,151.78x = 64,734.64 × 12,759.99
  4. Step 4: Simplify right side
    43,151.78x = 826,013,448.53
  5. Step 5: Solve for x
    x = 826,013,448.53/43,151.78
  6. Step 6: Final answer
    x = 19,142.05

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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.