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Finding the Fourth Proportional to 84,069.88, 115,979.62 and 55,352.48

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Solution

The fourth proportional to 84,069.88, 115,979.62 and 55,352.48 is: 76,362.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,069.88 : 115,979.62 = 55,352.48 : x
  2. Step 2: Convert to fraction form
    84,069.88/115,979.62 = 55,352.48/x
  3. Step 3: Cross multiply
    84,069.88x = 115,979.62 × 55,352.48
  4. Step 4: Simplify right side
    84,069.88x = 6,419,759,596.46
  5. Step 5: Solve for x
    x = 6,419,759,596.46/84,069.88
  6. Step 6: Final answer
    x = 76,362.18

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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.