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Finding the Fourth Proportional to 86,214.54, 118,977.11 and 48,488.79

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Solution

The fourth proportional to 86,214.54, 118,977.11 and 48,488.79 is: 66,915.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,214.54 : 118,977.11 = 48,488.79 : x
  2. Step 2: Convert to fraction form
    86,214.54/118,977.11 = 48,488.79/x
  3. Step 3: Cross multiply
    86,214.54x = 118,977.11 × 48,488.79
  4. Step 4: Simplify right side
    86,214.54x = 5,769,056,101.60
  5. Step 5: Solve for x
    x = 5,769,056,101.60/86,214.54
  6. Step 6: Final answer
    x = 66,915.12

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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.