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Finding the Fourth Proportional to 171,621.40, 257,432.10 and 159,957.40

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Solution

The fourth proportional to 171,621.40, 257,432.10 and 159,957.40 is: 239,936.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,621.40 : 257,432.10 = 159,957.40 : x
  2. Step 2: Convert to fraction form
    171,621.40/257,432.10 = 159,957.40/x
  3. Step 3: Cross multiply
    171,621.40x = 257,432.10 × 159,957.40
  4. Step 4: Simplify right side
    171,621.40x = 41,178,169,392.54
  5. Step 5: Solve for x
    x = 41,178,169,392.54/171,621.40
  6. Step 6: Final answer
    x = 239,936.10

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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.