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Finding the Fourth Proportional to 84,753.54, 127,137.72 and 31,446.12

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Solution

The fourth proportional to 84,753.54, 127,137.72 and 31,446.12 is: 47,171.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,753.54 : 127,137.72 = 31,446.12 : x
  2. Step 2: Convert to fraction form
    84,753.54/127,137.72 = 31,446.12/x
  3. Step 3: Cross multiply
    84,753.54x = 127,137.72 × 31,446.12
  4. Step 4: Simplify right side
    84,753.54x = 3,997,987,999.65
  5. Step 5: Solve for x
    x = 3,997,987,999.65/84,753.54
  6. Step 6: Final answer
    x = 47,171.93

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1.5x scale

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.