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Finding the Fourth Proportional to 66,463.20, 99,694.80 and 54,653.40

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Solution

The fourth proportional to 66,463.20, 99,694.80 and 54,653.40 is: 81,980.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,463.20 : 99,694.80 = 54,653.40 : x
  2. Step 2: Convert to fraction form
    66,463.20/99,694.80 = 54,653.40/x
  3. Step 3: Cross multiply
    66,463.20x = 99,694.80 × 54,653.40
  4. Step 4: Simplify right side
    66,463.20x = 5,448,659,782.32
  5. Step 5: Solve for x
    x = 5,448,659,782.32/66,463.20
  6. Step 6: Final answer
    x = 81,980.10

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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.