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Finding the Fourth Proportional to 158,333.73, 218,495.66 and 86,711.91

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Solution

The fourth proportional to 158,333.73, 218,495.66 and 86,711.91 is: 119,659.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,333.73 : 218,495.66 = 86,711.91 : x
  2. Step 2: Convert to fraction form
    158,333.73/218,495.66 = 86,711.91/x
  3. Step 3: Cross multiply
    158,333.73x = 218,495.66 × 86,711.91
  4. Step 4: Simplify right side
    158,333.73x = 18,946,175,571.75
  5. Step 5: Solve for x
    x = 18,946,175,571.75/158,333.73
  6. Step 6: Final answer
    x = 119,659.76

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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.