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Finding the Fourth Proportional to 188,805.78, 260,550 and 103,921.02

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Solution

The fourth proportional to 188,805.78, 260,550 and 103,921.02 is: 143,409.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,805.78 : 260,550 = 103,921.02 : x
  2. Step 2: Convert to fraction form
    188,805.78/260,550 = 103,921.02/x
  3. Step 3: Cross multiply
    188,805.78x = 260,550 × 103,921.02
  4. Step 4: Simplify right side
    188,805.78x = 27,076,621,761
  5. Step 5: Solve for x
    x = 27,076,621,761/188,805.78
  6. Step 6: Final answer
    x = 143,409.92

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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.