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Finding the Fourth Proportional to 210,679.14, 290,737.16 and 115,185.82

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Solution

The fourth proportional to 210,679.14, 290,737.16 and 115,185.82 is: 158,956.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,679.14 : 290,737.16 = 115,185.82 : x
  2. Step 2: Convert to fraction form
    210,679.14/290,737.16 = 115,185.82/x
  3. Step 3: Cross multiply
    210,679.14x = 290,737.16 × 115,185.82
  4. Step 4: Simplify right side
    210,679.14x = 33,488,798,179.07
  5. Step 5: Solve for x
    x = 33,488,798,179.07/210,679.14
  6. Step 6: Final answer
    x = 158,956.40

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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.