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Finding the Fourth Proportional to 210,659.28, 290,714.31 and 115,174.86

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Solution

The fourth proportional to 210,659.28, 290,714.31 and 115,174.86 is: 158,943.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,659.28 : 290,714.31 = 115,174.86 : x
  2. Step 2: Convert to fraction form
    210,659.28/290,714.31 = 115,174.86/x
  3. Step 3: Cross multiply
    210,659.28x = 290,714.31 × 115,174.86
  4. Step 4: Simplify right side
    210,659.28x = 33,482,979,954.25
  5. Step 5: Solve for x
    x = 33,482,979,954.25/210,659.28
  6. Step 6: Final answer
    x = 158,943.77

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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.