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Finding the Fourth Proportional to 54,689.60, 81,969.60 and 49,116.80

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Solution

The fourth proportional to 54,689.60, 81,969.60 and 49,116.80 is: 73,617.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,689.60 : 81,969.60 = 49,116.80 : x
  2. Step 2: Convert to fraction form
    54,689.60/81,969.60 = 49,116.80/x
  3. Step 3: Cross multiply
    54,689.60x = 81,969.60 × 49,116.80
  4. Step 4: Simplify right side
    54,689.60x = 4,026,084,449.28
  5. Step 5: Solve for x
    x = 4,026,084,449.28/54,689.60
  6. Step 6: Final answer
    x = 73,617.00

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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.