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Finding the Fourth Proportional to 98,922.40, 148,268.40 and 39,728.80

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Solution

The fourth proportional to 98,922.40, 148,268.40 and 39,728.80 is: 59,546.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,922.40 : 148,268.40 = 39,728.80 : x
  2. Step 2: Convert to fraction form
    98,922.40/148,268.40 = 39,728.80/x
  3. Step 3: Cross multiply
    98,922.40x = 148,268.40 × 39,728.80
  4. Step 4: Simplify right side
    98,922.40x = 5,890,525,609.92
  5. Step 5: Solve for x
    x = 5,890,525,609.92/98,922.40
  6. Step 6: Final answer
    x = 59,546.93

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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.