Home / 85,285.40-127,926.90-38,538.20

Finding the Fourth Proportional to 85,285.40, 127,926.90 and 38,538.20

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Solution

The fourth proportional to 85,285.40, 127,926.90 and 38,538.20 is: 57,806.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,285.40 : 127,926.90 = 38,538.20 : x
  2. Step 2: Convert to fraction form
    85,285.40/127,926.90 = 38,538.20/x
  3. Step 3: Cross multiply
    85,285.40x = 127,926.90 × 38,538.20
  4. Step 4: Simplify right side
    85,285.40x = 4,930,072,457.58
  5. Step 5: Solve for x
    x = 4,930,072,457.58/85,285.40
  6. Step 6: Final answer
    x = 57,806.76

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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.