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Finding the Fourth Proportional to 210,962.22, 291,128.22 and 115,474.97

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Solution

The fourth proportional to 210,962.22, 291,128.22 and 115,474.97 is: 159,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,962.22 : 291,128.22 = 115,474.97 : x
  2. Step 2: Convert to fraction form
    210,962.22/291,128.22 = 115,474.97/x
  3. Step 3: Cross multiply
    210,962.22x = 291,128.22 × 115,474.97
  4. Step 4: Simplify right side
    210,962.22x = 33,618,020,437.64
  5. Step 5: Solve for x
    x = 33,618,020,437.64/210,962.22
  6. Step 6: Final answer
    x = 159,355.64

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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.