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Finding the Fourth Proportional to 81,303.86, 112,209.64 and 49,470.86

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Solution

The fourth proportional to 81,303.86, 112,209.64 and 49,470.86 is: 68,276.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.86 : 112,209.64 = 49,470.86 : x
  2. Step 2: Convert to fraction form
    81,303.86/112,209.64 = 49,470.86/x
  3. Step 3: Cross multiply
    81,303.86x = 112,209.64 × 49,470.86
  4. Step 4: Simplify right side
    81,303.86x = 5,551,107,391.09
  5. Step 5: Solve for x
    x = 5,551,107,391.09/81,303.86
  6. Step 6: Final answer
    x = 68,276.06

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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.