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Finding the Fourth Proportional to 119,805.81, 165,332.19 and 66,090.72

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Solution

The fourth proportional to 119,805.81, 165,332.19 and 66,090.72 is: 91,205.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,805.81 : 165,332.19 = 66,090.72 : x
  2. Step 2: Convert to fraction form
    119,805.81/165,332.19 = 66,090.72/x
  3. Step 3: Cross multiply
    119,805.81x = 165,332.19 × 66,090.72
  4. Step 4: Simplify right side
    119,805.81x = 10,926,923,476.28
  5. Step 5: Solve for x
    x = 10,926,923,476.28/119,805.81
  6. Step 6: Final answer
    x = 91,205.29

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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.