Home / 85,395.05-128,122.24-38,043.76

Finding the Fourth Proportional to 85,395.05, 128,122.24 and 38,043.76

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Solution

The fourth proportional to 85,395.05, 128,122.24 and 38,043.76 is: 57,078.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,395.05 : 128,122.24 = 38,043.76 : x
  2. Step 2: Convert to fraction form
    85,395.05/128,122.24 = 38,043.76/x
  3. Step 3: Cross multiply
    85,395.05x = 128,122.24 × 38,043.76
  4. Step 4: Simplify right side
    85,395.05x = 4,874,251,749.22
  5. Step 5: Solve for x
    x = 4,874,251,749.22/85,395.05
  6. Step 6: Final answer
    x = 57,078.86

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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.