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Finding the Fourth Proportional to 158,590.33, 218,834.49 and 90,611.71

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Solution

The fourth proportional to 158,590.33, 218,834.49 and 90,611.71 is: 125,032.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,590.33 : 218,834.49 = 90,611.71 : x
  2. Step 2: Convert to fraction form
    158,590.33/218,834.49 = 90,611.71/x
  3. Step 3: Cross multiply
    158,590.33x = 218,834.49 × 90,611.71
  4. Step 4: Simplify right side
    158,590.33x = 19,828,967,138.59
  5. Step 5: Solve for x
    x = 19,828,967,138.59/158,590.33
  6. Step 6: Final answer
    x = 125,032.64

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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.