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Finding the Fourth Proportional to 119,661.80, 165,134.36 and 65,948.72

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Solution

The fourth proportional to 119,661.80, 165,134.36 and 65,948.72 is: 91,009.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,661.80 : 165,134.36 = 65,948.72 : x
  2. Step 2: Convert to fraction form
    119,661.80/165,134.36 = 65,948.72/x
  3. Step 3: Cross multiply
    119,661.80x = 165,134.36 × 65,948.72
  4. Step 4: Simplify right side
    119,661.80x = 10,890,399,670.02
  5. Step 5: Solve for x
    x = 10,890,399,670.02/119,661.80
  6. Step 6: Final answer
    x = 91,009.83

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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.