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Finding the Fourth Proportional to 210,872.79, 291,004.11 and 115,379.87

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Solution

The fourth proportional to 210,872.79, 291,004.11 and 115,379.87 is: 159,224.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,872.79 : 291,004.11 = 115,379.87 : x
  2. Step 2: Convert to fraction form
    210,872.79/291,004.11 = 115,379.87/x
  3. Step 3: Cross multiply
    210,872.79x = 291,004.11 × 115,379.87
  4. Step 4: Simplify right side
    210,872.79x = 33,576,014,926.25
  5. Step 5: Solve for x
    x = 33,576,014,926.25/210,872.79
  6. Step 6: Final answer
    x = 159,224.03

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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.