Home / 120,115.14-165,758.94-66,400.17

Finding the Fourth Proportional to 120,115.14, 165,758.94 and 66,400.17

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Solution

The fourth proportional to 120,115.14, 165,758.94 and 66,400.17 is: 91,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,115.14 : 165,758.94 = 66,400.17 : x
  2. Step 2: Convert to fraction form
    120,115.14/165,758.94 = 66,400.17/x
  3. Step 3: Cross multiply
    120,115.14x = 165,758.94 × 66,400.17
  4. Step 4: Simplify right side
    120,115.14x = 11,006,421,795.02
  5. Step 5: Solve for x
    x = 11,006,421,795.02/120,115.14
  6. Step 6: Final answer
    x = 91,632.26

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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.