Home / 100,329.11-138,455.52-55,006.98

Finding the Fourth Proportional to 100,329.11, 138,455.52 and 55,006.98

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Solution

The fourth proportional to 100,329.11, 138,455.52 and 55,006.98 is: 75,910.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.11 : 138,455.52 = 55,006.98 : x
  2. Step 2: Convert to fraction form
    100,329.11/138,455.52 = 55,006.98/x
  3. Step 3: Cross multiply
    100,329.11x = 138,455.52 × 55,006.98
  4. Step 4: Simplify right side
    100,329.11x = 7,616,019,744.49
  5. Step 5: Solve for x
    x = 7,616,019,744.49/100,329.11
  6. Step 6: Final answer
    x = 75,910.37

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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.