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Finding the Fourth Proportional to 100,519.99, 138,717.77 and 55,190.77

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Solution

The fourth proportional to 100,519.99, 138,717.77 and 55,190.77 is: 76,163.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,519.99 : 138,717.77 = 55,190.77 : x
  2. Step 2: Convert to fraction form
    100,519.99/138,717.77 = 55,190.77/x
  3. Step 3: Cross multiply
    100,519.99x = 138,717.77 × 55,190.77
  4. Step 4: Simplify right side
    100,519.99x = 7,655,939,916.23
  5. Step 5: Solve for x
    x = 7,655,939,916.23/100,519.99
  6. Step 6: Final answer
    x = 76,163.36

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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.