Home / 100,436.37-138,601.81-55,115.11

Finding the Fourth Proportional to 100,436.37, 138,601.81 and 55,115.11

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Solution

The fourth proportional to 100,436.37, 138,601.81 and 55,115.11 is: 76,058.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.37 : 138,601.81 = 55,115.11 : x
  2. Step 2: Convert to fraction form
    100,436.37/138,601.81 = 55,115.11/x
  3. Step 3: Cross multiply
    100,436.37x = 138,601.81 × 55,115.11
  4. Step 4: Simplify right side
    100,436.37x = 7,639,054,004.35
  5. Step 5: Solve for x
    x = 7,639,054,004.35/100,436.37
  6. Step 6: Final answer
    x = 76,058.64

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1.5x scale

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.