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Finding the Fourth Proportional to 252,393.65, 378,663.51 and 81,611.72

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Solution

The fourth proportional to 252,393.65, 378,663.51 and 81,611.72 is: 122,441.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,393.65 : 378,663.51 = 81,611.72 : x
  2. Step 2: Convert to fraction form
    252,393.65/378,663.51 = 81,611.72/x
  3. Step 3: Cross multiply
    252,393.65x = 378,663.51 × 81,611.72
  4. Step 4: Simplify right side
    252,393.65x = 30,903,381,605.04
  5. Step 5: Solve for x
    x = 30,903,381,605.04/252,393.65
  6. Step 6: Final answer
    x = 122,441.20

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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.