Home / 85,205.40-127,806.90-38,458.20

Finding the Fourth Proportional to 85,205.40, 127,806.90 and 38,458.20

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Solution

The fourth proportional to 85,205.40, 127,806.90 and 38,458.20 is: 57,686.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,205.40 : 127,806.90 = 38,458.20 : x
  2. Step 2: Convert to fraction form
    85,205.40/127,806.90 = 38,458.20/x
  3. Step 3: Cross multiply
    85,205.40x = 127,806.90 × 38,458.20
  4. Step 4: Simplify right side
    85,205.40x = 4,915,223,321.58
  5. Step 5: Solve for x
    x = 4,915,223,321.58/85,205.40
  6. Step 6: Final answer
    x = 57,686.76

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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.