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Finding the Fourth Proportional to 98,287.94, 147,215.80 and 81,227.59

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Solution

The fourth proportional to 98,287.94, 147,215.80 and 81,227.59 is: 121,662.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,287.94 : 147,215.80 = 81,227.59 : x
  2. Step 2: Convert to fraction form
    98,287.94/147,215.80 = 81,227.59/x
  3. Step 3: Cross multiply
    98,287.94x = 147,215.80 × 81,227.59
  4. Step 4: Simplify right side
    98,287.94x = 11,957,984,237.78
  5. Step 5: Solve for x
    x = 11,957,984,237.78/98,287.94
  6. Step 6: Final answer
    x = 121,662.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.