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Finding the Fourth Proportional to 188,476.42, 260,135.29 and 111,980.79

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Solution

The fourth proportional to 188,476.42, 260,135.29 and 111,980.79 is: 154,555.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,476.42 : 260,135.29 = 111,980.79 : x
  2. Step 2: Convert to fraction form
    188,476.42/260,135.29 = 111,980.79/x
  3. Step 3: Cross multiply
    188,476.42x = 260,135.29 × 111,980.79
  4. Step 4: Simplify right side
    188,476.42x = 29,130,155,976.63
  5. Step 5: Solve for x
    x = 29,130,155,976.63/188,476.42
  6. Step 6: Final answer
    x = 154,555.97

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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.