Home / 120,145.78-165,794.48-66,427.66

Finding the Fourth Proportional to 120,145.78, 165,794.48 and 66,427.66

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Solution

The fourth proportional to 120,145.78, 165,794.48 and 66,427.66 is: 91,666.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,145.78 : 165,794.48 = 66,427.66 : x
  2. Step 2: Convert to fraction form
    120,145.78/165,794.48 = 66,427.66/x
  3. Step 3: Cross multiply
    120,145.78x = 165,794.48 × 66,427.66
  4. Step 4: Simplify right side
    120,145.78x = 11,013,339,347.32
  5. Step 5: Solve for x
    x = 11,013,339,347.32/120,145.78
  6. Step 6: Final answer
    x = 91,666.47

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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.