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Finding the Fourth Proportional to 120,814.94, 166,745.97 and 90,340.94

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Solution

The fourth proportional to 120,814.94, 166,745.97 and 90,340.94 is: 124,686.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,814.94 : 166,745.97 = 90,340.94 : x
  2. Step 2: Convert to fraction form
    120,814.94/166,745.97 = 90,340.94/x
  3. Step 3: Cross multiply
    120,814.94x = 166,745.97 × 90,340.94
  4. Step 4: Simplify right side
    120,814.94x = 15,063,987,671.01
  5. Step 5: Solve for x
    x = 15,063,987,671.01/120,814.94
  6. Step 6: Final answer
    x = 124,686.46

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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.