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Finding the Fourth Proportional to 115,189.71, 158,971.04 and 64,218.94

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Solution

The fourth proportional to 115,189.71, 158,971.04 and 64,218.94 is: 88,627.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,189.71 : 158,971.04 = 64,218.94 : x
  2. Step 2: Convert to fraction form
    115,189.71/158,971.04 = 64,218.94/x
  3. Step 3: Cross multiply
    115,189.71x = 158,971.04 × 64,218.94
  4. Step 4: Simplify right side
    115,189.71x = 10,208,951,679.50
  5. Step 5: Solve for x
    x = 10,208,951,679.50/115,189.71
  6. Step 6: Final answer
    x = 88,627.29

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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.