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Finding the Fourth Proportional to 159,668.72, 220,332.77 and 91,637.81

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Solution

The fourth proportional to 159,668.72, 220,332.77 and 91,637.81 is: 126,454.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,668.72 : 220,332.77 = 91,637.81 : x
  2. Step 2: Convert to fraction form
    159,668.72/220,332.77 = 91,637.81/x
  3. Step 3: Cross multiply
    159,668.72x = 220,332.77 × 91,637.81
  4. Step 4: Simplify right side
    159,668.72x = 20,190,813,259.22
  5. Step 5: Solve for x
    x = 20,190,813,259.22/159,668.72
  6. Step 6: Final answer
    x = 126,454.41

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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.