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Finding the Fourth Proportional to 81,477.90, 112,436.37 and 47,488.14

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Solution

The fourth proportional to 81,477.90, 112,436.37 and 47,488.14 is: 65,531.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,477.90 : 112,436.37 = 47,488.14 : x
  2. Step 2: Convert to fraction form
    81,477.90/112,436.37 = 47,488.14/x
  3. Step 3: Cross multiply
    81,477.90x = 112,436.37 × 47,488.14
  4. Step 4: Simplify right side
    81,477.90x = 5,339,394,079.65
  5. Step 5: Solve for x
    x = 5,339,394,079.65/81,477.90
  6. Step 6: Final answer
    x = 65,531.81

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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.