Home / 100,744.51-139,029.92-55,423.72

Finding the Fourth Proportional to 100,744.51, 139,029.92 and 55,423.72

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Solution

The fourth proportional to 100,744.51, 139,029.92 and 55,423.72 is: 76,486.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,744.51 : 139,029.92 = 55,423.72 : x
  2. Step 2: Convert to fraction form
    100,744.51/139,029.92 = 55,423.72/x
  3. Step 3: Cross multiply
    100,744.51x = 139,029.92 × 55,423.72
  4. Step 4: Simplify right side
    100,744.51x = 7,705,555,357.70
  5. Step 5: Solve for x
    x = 7,705,555,357.70/100,744.51
  6. Step 6: Final answer
    x = 76,486.11

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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.