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Finding the Fourth Proportional to 188,978.96, 260,779.24 and 104,091.28

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Solution

The fourth proportional to 188,978.96, 260,779.24 and 104,091.28 is: 143,639.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,978.96 : 260,779.24 = 104,091.28 : x
  2. Step 2: Convert to fraction form
    188,978.96/260,779.24 = 104,091.28/x
  3. Step 3: Cross multiply
    188,978.96x = 260,779.24 × 104,091.28
  4. Step 4: Simplify right side
    188,978.96x = 27,144,844,889.03
  5. Step 5: Solve for x
    x = 27,144,844,889.03/188,978.96
  6. Step 6: Final answer
    x = 143,639.51

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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.