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Finding the Fourth Proportional to 81,454.40, 112,406.90 and 49,623.28

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Solution

The fourth proportional to 81,454.40, 112,406.90 and 49,623.28 is: 68,480.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,454.40 : 112,406.90 = 49,623.28 : x
  2. Step 2: Convert to fraction form
    81,454.40/112,406.90 = 49,623.28/x
  3. Step 3: Cross multiply
    81,454.40x = 112,406.90 × 49,623.28
  4. Step 4: Simplify right side
    81,454.40x = 5,577,999,072.63
  5. Step 5: Solve for x
    x = 5,577,999,072.63/81,454.40
  6. Step 6: Final answer
    x = 68,480.02

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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.