Home / 66,507.71-99,778.17-19,760.59

Finding the Fourth Proportional to 66,507.71, 99,778.17 and 19,760.59

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Solution

The fourth proportional to 66,507.71, 99,778.17 and 19,760.59 is: 29,645.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,507.71 : 99,778.17 = 19,760.59 : x
  2. Step 2: Convert to fraction form
    66,507.71/99,778.17 = 19,760.59/x
  3. Step 3: Cross multiply
    66,507.71x = 99,778.17 × 19,760.59
  4. Step 4: Simplify right side
    66,507.71x = 1,971,675,009.43
  5. Step 5: Solve for x
    x = 1,971,675,009.43/66,507.71
  6. Step 6: Final answer
    x = 29,645.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.