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Finding the Fourth Proportional to 86,189.46, 118,928.62 and 48,456.42

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Solution

The fourth proportional to 86,189.46, 118,928.62 and 48,456.42 is: 66,862.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,189.46 : 118,928.62 = 48,456.42 : x
  2. Step 2: Convert to fraction form
    86,189.46/118,928.62 = 48,456.42/x
  3. Step 3: Cross multiply
    86,189.46x = 118,928.62 × 48,456.42
  4. Step 4: Simplify right side
    86,189.46x = 5,762,855,160.74
  5. Step 5: Solve for x
    x = 5,762,855,160.74/86,189.46
  6. Step 6: Final answer
    x = 66,862.64

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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.