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Finding the Fourth Proportional to 66,039.60, 99,007.56 and 45,199.92

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Solution

The fourth proportional to 66,039.60, 99,007.56 and 45,199.92 is: 67,764.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,039.60 : 99,007.56 = 45,199.92 : x
  2. Step 2: Convert to fraction form
    66,039.60/99,007.56 = 45,199.92/x
  3. Step 3: Cross multiply
    66,039.60x = 99,007.56 × 45,199.92
  4. Step 4: Simplify right side
    66,039.60x = 4,475,133,791.40
  5. Step 5: Solve for x
    x = 4,475,133,791.40/66,039.60
  6. Step 6: Final answer
    x = 67,764.40

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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.