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Finding the Fourth Proportional to 145,645.89, 218,188.97 and 89,321.79

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Solution

The fourth proportional to 145,645.89, 218,188.97 and 89,321.79 is: 133,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,645.89 : 218,188.97 = 89,321.79 : x
  2. Step 2: Convert to fraction form
    145,645.89/218,188.97 = 89,321.79/x
  3. Step 3: Cross multiply
    145,645.89x = 218,188.97 × 89,321.79
  4. Step 4: Simplify right side
    145,645.89x = 19,489,029,358.66
  5. Step 5: Solve for x
    x = 19,489,029,358.66/145,645.89
  6. Step 6: Final answer
    x = 133,811.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.