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Finding the Fourth Proportional to 172,596.77, 258,930.45 and 72,756.98

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Solution

The fourth proportional to 172,596.77, 258,930.45 and 72,756.98 is: 109,150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,596.77 : 258,930.45 = 72,756.98 : x
  2. Step 2: Convert to fraction form
    172,596.77/258,930.45 = 72,756.98/x
  3. Step 3: Cross multiply
    172,596.77x = 258,930.45 × 72,756.98
  4. Step 4: Simplify right side
    172,596.77x = 18,838,996,277.39
  5. Step 5: Solve for x
    x = 18,838,996,277.39/172,596.77
  6. Step 6: Final answer
    x = 109,150.34

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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.