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Finding the Fourth Proportional to 148,898.40, 205,488.90 and 85,234.68

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Solution

The fourth proportional to 148,898.40, 205,488.90 and 85,234.68 is: 117,629.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,898.40 : 205,488.90 = 85,234.68 : x
  2. Step 2: Convert to fraction form
    148,898.40/205,488.90 = 85,234.68/x
  3. Step 3: Cross multiply
    148,898.40x = 205,488.90 × 85,234.68
  4. Step 4: Simplify right side
    148,898.40x = 17,514,780,635.05
  5. Step 5: Solve for x
    x = 17,514,780,635.05/148,898.40
  6. Step 6: Final answer
    x = 117,629.07

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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.