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Finding the Fourth Proportional to 158,279.92, 218,426.32 and 86,664.56

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Solution

The fourth proportional to 158,279.92, 218,426.32 and 86,664.56 is: 119,597.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,279.92 : 218,426.32 = 86,664.56 : x
  2. Step 2: Convert to fraction form
    158,279.92/218,426.32 = 86,664.56/x
  3. Step 3: Cross multiply
    158,279.92x = 218,426.32 × 86,664.56
  4. Step 4: Simplify right side
    158,279.92x = 18,929,820,915.22
  5. Step 5: Solve for x
    x = 18,929,820,915.22/158,279.92
  6. Step 6: Final answer
    x = 119,597.11

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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.