Home / 120,142.80-165,784.38-66,419.14

Finding the Fourth Proportional to 120,142.80, 165,784.38 and 66,419.14

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Solution

The fourth proportional to 120,142.80, 165,784.38 and 66,419.14 is: 91,651.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,142.80 : 165,784.38 = 66,419.14 : x
  2. Step 2: Convert to fraction form
    120,142.80/165,784.38 = 66,419.14/x
  3. Step 3: Cross multiply
    120,142.80x = 165,784.38 × 66,419.14
  4. Step 4: Simplify right side
    120,142.80x = 11,011,255,945.03
  5. Step 5: Solve for x
    x = 11,011,255,945.03/120,142.80
  6. Step 6: Final answer
    x = 91,651.40

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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.