Home / 105,939.29-159,637.67-87,631.37

Finding the Fourth Proportional to 105,939.29, 159,637.67 and 87,631.37

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Solution

The fourth proportional to 105,939.29, 159,637.67 and 87,631.37 is: 132,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,939.29 : 159,637.67 = 87,631.37 : x
  2. Step 2: Convert to fraction form
    105,939.29/159,637.67 = 87,631.37/x
  3. Step 3: Cross multiply
    105,939.29x = 159,637.67 × 87,631.37
  4. Step 4: Simplify right side
    105,939.29x = 13,989,267,416.62
  5. Step 5: Solve for x
    x = 13,989,267,416.62/105,939.29
  6. Step 6: Final answer
    x = 132,049.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.