Home / 172,139.72-258,267.90-87,935.36

Finding the Fourth Proportional to 172,139.72, 258,267.90 and 87,935.36

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Solution

The fourth proportional to 172,139.72, 258,267.90 and 87,935.36 is: 131,932.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,139.72 : 258,267.90 = 87,935.36 : x
  2. Step 2: Convert to fraction form
    172,139.72/258,267.90 = 87,935.36/x
  3. Step 3: Cross multiply
    172,139.72x = 258,267.90 × 87,935.36
  4. Step 4: Simplify right side
    172,139.72x = 22,710,880,762.94
  5. Step 5: Solve for x
    x = 22,710,880,762.94/172,139.72
  6. Step 6: Final answer
    x = 131,932.83

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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.