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Finding the Fourth Proportional to 81,460.80, 112,379.40 and 49,627.80

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Solution

The fourth proportional to 81,460.80, 112,379.40 and 49,627.80 is: 68,464.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,460.80 : 112,379.40 = 49,627.80 : x
  2. Step 2: Convert to fraction form
    81,460.80/112,379.40 = 49,627.80/x
  3. Step 3: Cross multiply
    81,460.80x = 112,379.40 × 49,627.80
  4. Step 4: Simplify right side
    81,460.80x = 5,577,142,387.32
  5. Step 5: Solve for x
    x = 5,577,142,387.32/81,460.80
  6. Step 6: Final answer
    x = 68,464.12

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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.