Home / 120,117.12-165,758.40-65,667.12

Finding the Fourth Proportional to 120,117.12, 165,758.40 and 65,667.12

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Solution

The fourth proportional to 120,117.12, 165,758.40 and 65,667.12 is: 90,618.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,117.12 : 165,758.40 = 65,667.12 : x
  2. Step 2: Convert to fraction form
    120,117.12/165,758.40 = 65,667.12/x
  3. Step 3: Cross multiply
    120,117.12x = 165,758.40 × 65,667.12
  4. Step 4: Simplify right side
    120,117.12x = 10,884,876,743.81
  5. Step 5: Solve for x
    x = 10,884,876,743.81/120,117.12
  6. Step 6: Final answer
    x = 90,618.86

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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.