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Finding the Fourth Proportional to 98,918.40, 148,262.40 and 39,724.80

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Solution

The fourth proportional to 98,918.40, 148,262.40 and 39,724.80 is: 59,540.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,918.40 : 148,262.40 = 39,724.80 : x
  2. Step 2: Convert to fraction form
    98,918.40/148,262.40 = 39,724.80/x
  3. Step 3: Cross multiply
    98,918.40x = 148,262.40 × 39,724.80
  4. Step 4: Simplify right side
    98,918.40x = 5,889,694,187.52
  5. Step 5: Solve for x
    x = 5,889,694,187.52/98,918.40
  6. Step 6: Final answer
    x = 59,540.94

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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.