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Finding the Fourth Proportional to 119,958.54, 165,542.84 and 66,247.20

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Solution

The fourth proportional to 119,958.54, 165,542.84 and 66,247.20 is: 91,421.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,958.54 : 165,542.84 = 66,247.20 : x
  2. Step 2: Convert to fraction form
    119,958.54/165,542.84 = 66,247.20/x
  3. Step 3: Cross multiply
    119,958.54x = 165,542.84 × 66,247.20
  4. Step 4: Simplify right side
    119,958.54x = 10,966,749,298.81
  5. Step 5: Solve for x
    x = 10,966,749,298.81/119,958.54
  6. Step 6: Final answer
    x = 91,421.16

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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.