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Finding the Fourth Proportional to 158,336.37, 218,498.31 and 86,716.98

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Solution

The fourth proportional to 158,336.37, 218,498.31 and 86,716.98 is: 119,666.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,336.37 : 218,498.31 = 86,716.98 : x
  2. Step 2: Convert to fraction form
    158,336.37/218,498.31 = 86,716.98/x
  3. Step 3: Cross multiply
    158,336.37x = 218,498.31 × 86,716.98
  4. Step 4: Simplify right side
    158,336.37x = 18,947,513,578.30
  5. Step 5: Solve for x
    x = 18,947,513,578.30/158,336.37
  6. Step 6: Final answer
    x = 119,666.21

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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.