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Finding the Fourth Proportional to 98,680.69, 147,998.70 and 45,321.37

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Solution

The fourth proportional to 98,680.69, 147,998.70 and 45,321.37 is: 67,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,680.69 : 147,998.70 = 45,321.37 : x
  2. Step 2: Convert to fraction form
    98,680.69/147,998.70 = 45,321.37/x
  3. Step 3: Cross multiply
    98,680.69x = 147,998.70 × 45,321.37
  4. Step 4: Simplify right side
    98,680.69x = 6,707,503,842.22
  5. Step 5: Solve for x
    x = 6,707,503,842.22/98,680.69
  6. Step 6: Final answer
    x = 67,971.80

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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.