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Finding the Fourth Proportional to 171,470.39, 257,026.97 and 71,688.51

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Solution

The fourth proportional to 171,470.39, 257,026.97 and 71,688.51 is: 107,458.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,470.39 : 257,026.97 = 71,688.51 : x
  2. Step 2: Convert to fraction form
    171,470.39/257,026.97 = 71,688.51/x
  3. Step 3: Cross multiply
    171,470.39x = 257,026.97 × 71,688.51
  4. Step 4: Simplify right side
    171,470.39x = 18,425,880,688.34
  5. Step 5: Solve for x
    x = 18,425,880,688.34/171,470.39
  6. Step 6: Final answer
    x = 107,458.09

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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.