Home / 100,436.45-138,601.92-55,115.19

Finding the Fourth Proportional to 100,436.45, 138,601.92 and 55,115.19

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Solution

The fourth proportional to 100,436.45, 138,601.92 and 55,115.19 is: 76,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.45 : 138,601.92 = 55,115.19 : x
  2. Step 2: Convert to fraction form
    100,436.45/138,601.92 = 55,115.19/x
  3. Step 3: Cross multiply
    100,436.45x = 138,601.92 × 55,115.19
  4. Step 4: Simplify right side
    100,436.45x = 7,639,071,501.67
  5. Step 5: Solve for x
    x = 7,639,071,501.67/100,436.45
  6. Step 6: Final answer
    x = 76,058.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.