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Finding the Fourth Proportional to 66,446.40, 99,669.60 and 54,004.80

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Solution

The fourth proportional to 66,446.40, 99,669.60 and 54,004.80 is: 81,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,446.40 : 99,669.60 = 54,004.80 : x
  2. Step 2: Convert to fraction form
    66,446.40/99,669.60 = 54,004.80/x
  3. Step 3: Cross multiply
    66,446.40x = 99,669.60 × 54,004.80
  4. Step 4: Simplify right side
    66,446.40x = 5,382,636,814.08
  5. Step 5: Solve for x
    x = 5,382,636,814.08/66,446.40
  6. Step 6: Final answer
    x = 81,007.20

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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.