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Finding the Fourth Proportional to 188,768.52, 260,505.72 and 103,890.78

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Solution

The fourth proportional to 188,768.52, 260,505.72 and 103,890.78 is: 143,372.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,768.52 : 260,505.72 = 103,890.78 : x
  2. Step 2: Convert to fraction form
    188,768.52/260,505.72 = 103,890.78/x
  3. Step 3: Cross multiply
    188,768.52x = 260,505.72 × 103,890.78
  4. Step 4: Simplify right side
    188,768.52x = 27,064,142,445.26
  5. Step 5: Solve for x
    x = 27,064,142,445.26/188,768.52
  6. Step 6: Final answer
    x = 143,372.12

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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.