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Finding the Fourth Proportional to 84,893.76, 117,109.12 and 57,660.16

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Solution

The fourth proportional to 84,893.76, 117,109.12 and 57,660.16 is: 79,540.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,893.76 : 117,109.12 = 57,660.16 : x
  2. Step 2: Convert to fraction form
    84,893.76/117,109.12 = 57,660.16/x
  3. Step 3: Cross multiply
    84,893.76x = 117,109.12 × 57,660.16
  4. Step 4: Simplify right side
    84,893.76x = 6,752,530,596.66
  5. Step 5: Solve for x
    x = 6,752,530,596.66/84,893.76
  6. Step 6: Final answer
    x = 79,540.95

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1.5x scale

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.