Home / 100,756.08-139,043.39-55,433.10

Finding the Fourth Proportional to 100,756.08, 139,043.39 and 55,433.10

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Solution

The fourth proportional to 100,756.08, 139,043.39 and 55,433.10 is: 76,497.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,756.08 : 139,043.39 = 55,433.10 : x
  2. Step 2: Convert to fraction form
    100,756.08/139,043.39 = 55,433.10/x
  3. Step 3: Cross multiply
    100,756.08x = 139,043.39 × 55,433.10
  4. Step 4: Simplify right side
    100,756.08x = 7,707,605,865.04
  5. Step 5: Solve for x
    x = 7,707,605,865.04/100,756.08
  6. Step 6: Final answer
    x = 76,497.68

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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.