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Finding the Fourth Proportional to 86,703.75, 119,660.90 and 48,980.43

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Solution

The fourth proportional to 86,703.75, 119,660.90 and 48,980.43 is: 67,598.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,703.75 : 119,660.90 = 48,980.43 : x
  2. Step 2: Convert to fraction form
    86,703.75/119,660.90 = 48,980.43/x
  3. Step 3: Cross multiply
    86,703.75x = 119,660.90 × 48,980.43
  4. Step 4: Simplify right side
    86,703.75x = 5,861,042,091.28
  5. Step 5: Solve for x
    x = 5,861,042,091.28/86,703.75
  6. Step 6: Final answer
    x = 67,598.48

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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.