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Finding the Fourth Proportional to 157,661.46, 217,577.90 and 89,676.68

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Solution

The fourth proportional to 157,661.46, 217,577.90 and 89,676.68 is: 123,756.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,661.46 : 217,577.90 = 89,676.68 : x
  2. Step 2: Convert to fraction form
    157,661.46/217,577.90 = 89,676.68/x
  3. Step 3: Cross multiply
    157,661.46x = 217,577.90 × 89,676.68
  4. Step 4: Simplify right side
    157,661.46x = 19,511,664,481.51
  5. Step 5: Solve for x
    x = 19,511,664,481.51/157,661.46
  6. Step 6: Final answer
    x = 123,756.72

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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.