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Finding the Fourth Proportional to 119,903.94, 165,468.60 and 66,187.80

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Solution

The fourth proportional to 119,903.94, 165,468.60 and 66,187.80 is: 91,339.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,903.94 : 165,468.60 = 66,187.80 : x
  2. Step 2: Convert to fraction form
    119,903.94/165,468.60 = 66,187.80/x
  3. Step 3: Cross multiply
    119,903.94x = 165,468.60 × 66,187.80
  4. Step 4: Simplify right side
    119,903.94x = 10,952,002,603.08
  5. Step 5: Solve for x
    x = 10,952,002,603.08/119,903.94
  6. Step 6: Final answer
    x = 91,339.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.