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Finding the Fourth Proportional to 117,287.81, 161,855.42 and 66,298.74

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Solution

The fourth proportional to 117,287.81, 161,855.42 and 66,298.74 is: 91,491.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,287.81 : 161,855.42 = 66,298.74 : x
  2. Step 2: Convert to fraction form
    117,287.81/161,855.42 = 66,298.74/x
  3. Step 3: Cross multiply
    117,287.81x = 161,855.42 × 66,298.74
  4. Step 4: Simplify right side
    117,287.81x = 10,730,810,076.68
  5. Step 5: Solve for x
    x = 10,730,810,076.68/117,287.81
  6. Step 6: Final answer
    x = 91,491.27

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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.