Home / 100,921.72-139,282.92-55,604.35

Finding the Fourth Proportional to 100,921.72, 139,282.92 and 55,604.35

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Solution

The fourth proportional to 100,921.72, 139,282.92 and 55,604.35 is: 76,740.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.72 : 139,282.92 = 55,604.35 : x
  2. Step 2: Convert to fraction form
    100,921.72/139,282.92 = 55,604.35/x
  3. Step 3: Cross multiply
    100,921.72x = 139,282.92 × 55,604.35
  4. Step 4: Simplify right side
    100,921.72x = 7,744,736,232.70
  5. Step 5: Solve for x
    x = 7,744,736,232.70/100,921.72
  6. Step 6: Final answer
    x = 76,740.03

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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.