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Finding the Fourth Proportional to 148,855.39, 205,421.90 and 80,872.90

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Solution

The fourth proportional to 148,855.39, 205,421.90 and 80,872.90 is: 111,605.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,855.39 : 205,421.90 = 80,872.90 : x
  2. Step 2: Convert to fraction form
    148,855.39/205,421.90 = 80,872.90/x
  3. Step 3: Cross multiply
    148,855.39x = 205,421.90 × 80,872.90
  4. Step 4: Simplify right side
    148,855.39x = 16,613,063,858.59
  5. Step 5: Solve for x
    x = 16,613,063,858.59/148,855.39
  6. Step 6: Final answer
    x = 111,605.39

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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.