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Finding the Fourth Proportional to 259,487.20, 388,942.80 and 101,663.20

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Solution

The fourth proportional to 259,487.20, 388,942.80 and 101,663.20 is: 152,381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,487.20 : 388,942.80 = 101,663.20 : x
  2. Step 2: Convert to fraction form
    259,487.20/388,942.80 = 101,663.20/x
  3. Step 3: Cross multiply
    259,487.20x = 388,942.80 × 101,663.20
  4. Step 4: Simplify right side
    259,487.20x = 39,541,169,664.96
  5. Step 5: Solve for x
    x = 39,541,169,664.96/259,487.20
  6. Step 6: Final answer
    x = 152,381.97

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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.