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Finding the Fourth Proportional to 210,881.66, 291,016.71 and 115,388.37

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Solution

The fourth proportional to 210,881.66, 291,016.71 and 115,388.37 is: 159,235.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,881.66 : 291,016.71 = 115,388.37 : x
  2. Step 2: Convert to fraction form
    210,881.66/291,016.71 = 115,388.37/x
  3. Step 3: Cross multiply
    210,881.66x = 291,016.71 × 115,388.37
  4. Step 4: Simplify right side
    210,881.66x = 33,579,943,809.66
  5. Step 5: Solve for x
    x = 33,579,943,809.66/210,881.66
  6. Step 6: Final answer
    x = 159,235.96

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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.