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Finding the Fourth Proportional to 86,663.40, 129,912.04 and 36,674.71

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Solution

The fourth proportional to 86,663.40, 129,912.04 and 36,674.71 is: 54,976.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,663.40 : 129,912.04 = 36,674.71 : x
  2. Step 2: Convert to fraction form
    86,663.40/129,912.04 = 36,674.71/x
  3. Step 3: Cross multiply
    86,663.40x = 129,912.04 × 36,674.71
  4. Step 4: Simplify right side
    86,663.40x = 4,764,486,392.51
  5. Step 5: Solve for x
    x = 4,764,486,392.51/86,663.40
  6. Step 6: Final answer
    x = 54,976.92

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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.