Home / 100,631.60-138,871.72-55,309.57

Finding the Fourth Proportional to 100,631.60, 138,871.72 and 55,309.57

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Solution

The fourth proportional to 100,631.60, 138,871.72 and 55,309.57 is: 76,327.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,631.60 : 138,871.72 = 55,309.57 : x
  2. Step 2: Convert to fraction form
    100,631.60/138,871.72 = 55,309.57/x
  3. Step 3: Cross multiply
    100,631.60x = 138,871.72 × 55,309.57
  4. Step 4: Simplify right side
    100,631.60x = 7,680,935,118.36
  5. Step 5: Solve for x
    x = 7,680,935,118.36/100,631.60
  6. Step 6: Final answer
    x = 76,327.27

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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.