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Finding the Fourth Proportional to 172,590.77, 258,921.45 and 72,750.98

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Solution

The fourth proportional to 172,590.77, 258,921.45 and 72,750.98 is: 109,141.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,590.77 : 258,921.45 = 72,750.98 : x
  2. Step 2: Convert to fraction form
    172,590.77/258,921.45 = 72,750.98/x
  3. Step 3: Cross multiply
    172,590.77x = 258,921.45 × 72,750.98
  4. Step 4: Simplify right side
    172,590.77x = 18,836,787,935.91
  5. Step 5: Solve for x
    x = 18,836,787,935.91/172,590.77
  6. Step 6: Final answer
    x = 109,141.34

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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.