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Finding the Fourth Proportional to 171,503.35, 257,342.77 and 81,647.62

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Solution

The fourth proportional to 171,503.35, 257,342.77 and 81,647.62 is: 122,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,503.35 : 257,342.77 = 81,647.62 : x
  2. Step 2: Convert to fraction form
    171,503.35/257,342.77 = 81,647.62/x
  3. Step 3: Cross multiply
    171,503.35x = 257,342.77 × 81,647.62
  4. Step 4: Simplify right side
    171,503.35x = 21,011,424,694.71
  5. Step 5: Solve for x
    x = 21,011,424,694.71/171,503.35
  6. Step 6: Final answer
    x = 122,513.20

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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.