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Finding the Fourth Proportional to 158,665.13, 218,977.24 and 90,684.97

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Solution

The fourth proportional to 158,665.13, 218,977.24 and 90,684.97 is: 125,156.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,665.13 : 218,977.24 = 90,684.97 : x
  2. Step 2: Convert to fraction form
    158,665.13/218,977.24 = 90,684.97/x
  3. Step 3: Cross multiply
    158,665.13x = 218,977.24 × 90,684.97
  4. Step 4: Simplify right side
    158,665.13x = 19,857,943,835.96
  5. Step 5: Solve for x
    x = 19,857,943,835.96/158,665.13
  6. Step 6: Final answer
    x = 125,156.32

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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.