Home / 100,670.40-138,924.72-55,351.26

Finding the Fourth Proportional to 100,670.40, 138,924.72 and 55,351.26

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Solution

The fourth proportional to 100,670.40, 138,924.72 and 55,351.26 is: 76,384.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.40 : 138,924.72 = 55,351.26 : x
  2. Step 2: Convert to fraction form
    100,670.40/138,924.72 = 55,351.26/x
  3. Step 3: Cross multiply
    100,670.40x = 138,924.72 × 55,351.26
  4. Step 4: Simplify right side
    100,670.40x = 7,689,658,297.15
  5. Step 5: Solve for x
    x = 7,689,658,297.15/100,670.40
  6. Step 6: Final answer
    x = 76,384.50

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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.