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Finding the Fourth Proportional to 171,439.77, 257,035.10 and 71,628.51

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Solution

The fourth proportional to 171,439.77, 257,035.10 and 71,628.51 is: 107,390.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,439.77 : 257,035.10 = 71,628.51 : x
  2. Step 2: Convert to fraction form
    171,439.77/257,035.10 = 71,628.51/x
  3. Step 3: Cross multiply
    171,439.77x = 257,035.10 × 71,628.51
  4. Step 4: Simplify right side
    171,439.77x = 18,411,041,230.70
  5. Step 5: Solve for x
    x = 18,411,041,230.70/171,439.77
  6. Step 6: Final answer
    x = 107,390.73

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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.