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Finding the Fourth Proportional to 85,103.91, 117,403.98 and 54,898.97

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Solution

The fourth proportional to 85,103.91, 117,403.98 and 54,898.97 is: 75,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,103.91 : 117,403.98 = 54,898.97 : x
  2. Step 2: Convert to fraction form
    85,103.91/117,403.98 = 54,898.97/x
  3. Step 3: Cross multiply
    85,103.91x = 117,403.98 × 54,898.97
  4. Step 4: Simplify right side
    85,103.91x = 6,445,356,988.88
  5. Step 5: Solve for x
    x = 6,445,356,988.88/85,103.91
  6. Step 6: Final answer
    x = 75,735.15

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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.