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Finding the Fourth Proportional to 86,659.39, 129,906.05 and 36,670.71

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Solution

The fourth proportional to 86,659.39, 129,906.05 and 36,670.71 is: 54,970.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,659.39 : 129,906.05 = 36,670.71 : x
  2. Step 2: Convert to fraction form
    86,659.39/129,906.05 = 36,670.71/x
  3. Step 3: Cross multiply
    86,659.39x = 129,906.05 × 36,670.71
  4. Step 4: Simplify right side
    86,659.39x = 4,763,747,390.59
  5. Step 5: Solve for x
    x = 4,763,747,390.59/86,659.39
  6. Step 6: Final answer
    x = 54,970.93

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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.