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Finding the Fourth Proportional to 119,722.91, 165,225.02 and 66,007.80

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Solution

The fourth proportional to 119,722.91, 165,225.02 and 66,007.80 is: 91,094.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,722.91 : 165,225.02 = 66,007.80 : x
  2. Step 2: Convert to fraction form
    119,722.91/165,225.02 = 66,007.80/x
  3. Step 3: Cross multiply
    119,722.91x = 165,225.02 × 66,007.80
  4. Step 4: Simplify right side
    119,722.91x = 10,906,139,745.12
  5. Step 5: Solve for x
    x = 10,906,139,745.12/119,722.91
  6. Step 6: Final answer
    x = 91,094.85

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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.