Home / 120,123.05-165,755.41-66,400.77

Finding the Fourth Proportional to 120,123.05, 165,755.41 and 66,400.77

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Solution

The fourth proportional to 120,123.05, 165,755.41 and 66,400.77 is: 91,625.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,123.05 : 165,755.41 = 66,400.77 : x
  2. Step 2: Convert to fraction form
    120,123.05/165,755.41 = 66,400.77/x
  3. Step 3: Cross multiply
    120,123.05x = 165,755.41 × 66,400.77
  4. Step 4: Simplify right side
    120,123.05x = 11,006,285,694.88
  5. Step 5: Solve for x
    x = 11,006,285,694.88/120,123.05
  6. Step 6: Final answer
    x = 91,625.10

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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.