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Finding the Fourth Proportional to 158,590.75, 218,835.12 and 86,951.92

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Solution

The fourth proportional to 158,590.75, 218,835.12 and 86,951.92 is: 119,982.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,590.75 : 218,835.12 = 86,951.92 : x
  2. Step 2: Convert to fraction form
    158,590.75/218,835.12 = 86,951.92/x
  3. Step 3: Cross multiply
    158,590.75x = 218,835.12 × 86,951.92
  4. Step 4: Simplify right side
    158,590.75x = 19,028,133,847.43
  5. Step 5: Solve for x
    x = 19,028,133,847.43/158,590.75
  6. Step 6: Final answer
    x = 119,982.62

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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.