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Finding the Fourth Proportional to 119,720.81, 165,211.58 and 66,004.88

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Solution

The fourth proportional to 119,720.81, 165,211.58 and 66,004.88 is: 91,085.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,720.81 : 165,211.58 = 66,004.88 : x
  2. Step 2: Convert to fraction form
    119,720.81/165,211.58 = 66,004.88/x
  3. Step 3: Cross multiply
    119,720.81x = 165,211.58 × 66,004.88
  4. Step 4: Simplify right side
    119,720.81x = 10,904,769,356.43
  5. Step 5: Solve for x
    x = 10,904,769,356.43/119,720.81
  6. Step 6: Final answer
    x = 91,085.00

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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.