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Finding the Fourth Proportional to 137,077.08, 205,046.99 and 128,679

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Solution

The fourth proportional to 137,077.08, 205,046.99 and 128,679 is: 192,484.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,077.08 : 205,046.99 = 128,679 : x
  2. Step 2: Convert to fraction form
    137,077.08/205,046.99 = 128,679/x
  3. Step 3: Cross multiply
    137,077.08x = 205,046.99 × 128,679
  4. Step 4: Simplify right side
    137,077.08x = 26,385,241,626.21
  5. Step 5: Solve for x
    x = 26,385,241,626.21/137,077.08
  6. Step 6: Final answer
    x = 192,484.71

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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.