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Finding the Fourth Proportional to 158,252.70, 218,391.30 and 86,631.51

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Solution

The fourth proportional to 158,252.70, 218,391.30 and 86,631.51 is: 119,552.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,252.70 : 218,391.30 = 86,631.51 : x
  2. Step 2: Convert to fraction form
    158,252.70/218,391.30 = 86,631.51/x
  3. Step 3: Cross multiply
    158,252.70x = 218,391.30 × 86,631.51
  4. Step 4: Simplify right side
    158,252.70x = 18,919,568,089.86
  5. Step 5: Solve for x
    x = 18,919,568,089.86/158,252.70
  6. Step 6: Final answer
    x = 119,552.89

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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.