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Finding the Fourth Proportional to 116,704.80, 161,053.28 and 66,403.80

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Solution

The fourth proportional to 116,704.80, 161,053.28 and 66,403.80 is: 91,637.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,704.80 : 161,053.28 = 66,403.80 : x
  2. Step 2: Convert to fraction form
    116,704.80/161,053.28 = 66,403.80/x
  3. Step 3: Cross multiply
    116,704.80x = 161,053.28 × 66,403.80
  4. Step 4: Simplify right side
    116,704.80x = 10,694,549,794.46
  5. Step 5: Solve for x
    x = 10,694,549,794.46/116,704.80
  6. Step 6: Final answer
    x = 91,637.62

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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.