Home / 100,325.64-138,450.94-55,007.76

Finding the Fourth Proportional to 100,325.64, 138,450.94 and 55,007.76

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Solution

The fourth proportional to 100,325.64, 138,450.94 and 55,007.76 is: 75,911.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,325.64 : 138,450.94 = 55,007.76 : x
  2. Step 2: Convert to fraction form
    100,325.64/138,450.94 = 55,007.76/x
  3. Step 3: Cross multiply
    100,325.64x = 138,450.94 × 55,007.76
  4. Step 4: Simplify right side
    100,325.64x = 7,615,876,079.29
  5. Step 5: Solve for x
    x = 7,615,876,079.29/100,325.64
  6. Step 6: Final answer
    x = 75,911.56

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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.