Home / 121,758.96-168,134.40-76,515.60

Finding the Fourth Proportional to 121,758.96, 168,134.40 and 76,515.60

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Solution

The fourth proportional to 121,758.96, 168,134.40 and 76,515.60 is: 105,658.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,758.96 : 168,134.40 = 76,515.60 : x
  2. Step 2: Convert to fraction form
    121,758.96/168,134.40 = 76,515.60/x
  3. Step 3: Cross multiply
    121,758.96x = 168,134.40 × 76,515.60
  4. Step 4: Simplify right side
    121,758.96x = 12,864,904,496.64
  5. Step 5: Solve for x
    x = 12,864,904,496.64/121,758.96
  6. Step 6: Final answer
    x = 105,658.79

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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.