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Finding the Fourth Proportional to 99,963.81, 149,871.65 and 60,511.59

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Solution

The fourth proportional to 99,963.81, 149,871.65 and 60,511.59 is: 90,722.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,963.81 : 149,871.65 = 60,511.59 : x
  2. Step 2: Convert to fraction form
    99,963.81/149,871.65 = 60,511.59/x
  3. Step 3: Cross multiply
    99,963.81x = 149,871.65 × 60,511.59
  4. Step 4: Simplify right side
    99,963.81x = 9,068,971,534.87
  5. Step 5: Solve for x
    x = 9,068,971,534.87/99,963.81
  6. Step 6: Final answer
    x = 90,722.55

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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.