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Finding the Fourth Proportional to 98,571.80, 147,930.60 and 65,280.80

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Solution

The fourth proportional to 98,571.80, 147,930.60 and 65,280.80 is: 97,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,571.80 : 147,930.60 = 65,280.80 : x
  2. Step 2: Convert to fraction form
    98,571.80/147,930.60 = 65,280.80/x
  3. Step 3: Cross multiply
    98,571.80x = 147,930.60 × 65,280.80
  4. Step 4: Simplify right side
    98,571.80x = 9,657,027,912.48
  5. Step 5: Solve for x
    x = 9,657,027,912.48/98,571.80
  6. Step 6: Final answer
    x = 97,969.48

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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.