Home / 85,614.19-128,422.15-38,231.69

Finding the Fourth Proportional to 85,614.19, 128,422.15 and 38,231.69

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Solution

The fourth proportional to 85,614.19, 128,422.15 and 38,231.69 is: 57,347.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.19 : 128,422.15 = 38,231.69 : x
  2. Step 2: Convert to fraction form
    85,614.19/128,422.15 = 38,231.69/x
  3. Step 3: Cross multiply
    85,614.19x = 128,422.15 × 38,231.69
  4. Step 4: Simplify right side
    85,614.19x = 4,909,795,732.35
  5. Step 5: Solve for x
    x = 4,909,795,732.35/85,614.19
  6. Step 6: Final answer
    x = 57,347.92

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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.