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Finding the Fourth Proportional to 119,712.85, 165,204.81 and 65,999.77

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Solution

The fourth proportional to 119,712.85, 165,204.81 and 65,999.77 is: 91,080.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,712.85 : 165,204.81 = 65,999.77 : x
  2. Step 2: Convert to fraction form
    119,712.85/165,204.81 = 65,999.77/x
  3. Step 3: Cross multiply
    119,712.85x = 165,204.81 × 65,999.77
  4. Step 4: Simplify right side
    119,712.85x = 10,903,479,049.88
  5. Step 5: Solve for x
    x = 10,903,479,049.88/119,712.85
  6. Step 6: Final answer
    x = 91,080.27

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1.5x scale

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.