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Finding the Fourth Proportional to 98,728.30, 148,201.80 and 61,330.60

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Solution

The fourth proportional to 98,728.30, 148,201.80 and 61,330.60 is: 92,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,728.30 : 148,201.80 = 61,330.60 : x
  2. Step 2: Convert to fraction form
    98,728.30/148,201.80 = 61,330.60/x
  3. Step 3: Cross multiply
    98,728.30x = 148,201.80 × 61,330.60
  4. Step 4: Simplify right side
    98,728.30x = 9,089,305,315.08
  5. Step 5: Solve for x
    x = 9,089,305,315.08/98,728.30
  6. Step 6: Final answer
    x = 92,063.83

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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.