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Finding the Fourth Proportional to 85,103.48, 117,493.45 and 75,644.70

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Solution

The fourth proportional to 85,103.48, 117,493.45 and 75,644.70 is: 104,434.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,103.48 : 117,493.45 = 75,644.70 : x
  2. Step 2: Convert to fraction form
    85,103.48/117,493.45 = 75,644.70/x
  3. Step 3: Cross multiply
    85,103.48x = 117,493.45 × 75,644.70
  4. Step 4: Simplify right side
    85,103.48x = 8,887,756,588.10
  5. Step 5: Solve for x
    x = 8,887,756,588.10/85,103.48
  6. Step 6: Final answer
    x = 104,434.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.