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Finding the Fourth Proportional to 86,659.82, 129,963.90 and 36,739.11

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Solution

The fourth proportional to 86,659.82, 129,963.90 and 36,739.11 is: 55,097.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,659.82 : 129,963.90 = 36,739.11 : x
  2. Step 2: Convert to fraction form
    86,659.82/129,963.90 = 36,739.11/x
  3. Step 3: Cross multiply
    86,659.82x = 129,963.90 × 36,739.11
  4. Step 4: Simplify right side
    86,659.82x = 4,774,758,018.13
  5. Step 5: Solve for x
    x = 4,774,758,018.13/86,659.82
  6. Step 6: Final answer
    x = 55,097.72

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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.