Home / 100,942.72-139,307.26-55,620.68

Finding the Fourth Proportional to 100,942.72, 139,307.26 and 55,620.68

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Solution

The fourth proportional to 100,942.72, 139,307.26 and 55,620.68 is: 76,760.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,942.72 : 139,307.26 = 55,620.68 : x
  2. Step 2: Convert to fraction form
    100,942.72/139,307.26 = 55,620.68/x
  3. Step 3: Cross multiply
    100,942.72x = 139,307.26 × 55,620.68
  4. Step 4: Simplify right side
    100,942.72x = 7,748,364,530.14
  5. Step 5: Solve for x
    x = 7,748,364,530.14/100,942.72
  6. Step 6: Final answer
    x = 76,760.01

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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.