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Finding the Fourth Proportional to 245,939.29, 369,016.15 and 86,129.87

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Solution

The fourth proportional to 245,939.29, 369,016.15 and 86,129.87 is: 129,232.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,939.29 : 369,016.15 = 86,129.87 : x
  2. Step 2: Convert to fraction form
    245,939.29/369,016.15 = 86,129.87/x
  3. Step 3: Cross multiply
    245,939.29x = 369,016.15 × 86,129.87
  4. Step 4: Simplify right side
    245,939.29x = 31,783,310,751.67
  5. Step 5: Solve for x
    x = 31,783,310,751.67/245,939.29
  6. Step 6: Final answer
    x = 129,232.34

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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.