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Finding the Fourth Proportional to 86,620.56, 129,973.92 and 48,646.26

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Solution

The fourth proportional to 86,620.56, 129,973.92 and 48,646.26 is: 72,993.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,620.56 : 129,973.92 = 48,646.26 : x
  2. Step 2: Convert to fraction form
    86,620.56/129,973.92 = 48,646.26/x
  3. Step 3: Cross multiply
    86,620.56x = 129,973.92 × 48,646.26
  4. Step 4: Simplify right side
    86,620.56x = 6,322,745,105.54
  5. Step 5: Solve for x
    x = 6,322,745,105.54/86,620.56
  6. Step 6: Final answer
    x = 72,993.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.