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Finding the Fourth Proportional to 133,358.88, 183,968.16 and 87,989.04

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Solution

The fourth proportional to 133,358.88, 183,968.16 and 87,989.04 is: 121,380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,358.88 : 183,968.16 = 87,989.04 : x
  2. Step 2: Convert to fraction form
    133,358.88/183,968.16 = 87,989.04/x
  3. Step 3: Cross multiply
    133,358.88x = 183,968.16 × 87,989.04
  4. Step 4: Simplify right side
    133,358.88x = 16,187,181,788.97
  5. Step 5: Solve for x
    x = 16,187,181,788.97/133,358.88
  6. Step 6: Final answer
    x = 121,380.61

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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.