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Finding the Fourth Proportional to 121,935.70, 168,328.79 and 91,732.52

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Solution

The fourth proportional to 121,935.70, 168,328.79 and 91,732.52 is: 126,634.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,935.70 : 168,328.79 = 91,732.52 : x
  2. Step 2: Convert to fraction form
    121,935.70/168,328.79 = 91,732.52/x
  3. Step 3: Cross multiply
    121,935.70x = 168,328.79 × 91,732.52
  4. Step 4: Simplify right side
    121,935.70x = 15,441,224,095.25
  5. Step 5: Solve for x
    x = 15,441,224,095.25/121,935.70
  6. Step 6: Final answer
    x = 126,634.15

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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.