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Finding the Fourth Proportional to 71,468.48, 98,618.04 and 39,629.60

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Solution

The fourth proportional to 71,468.48, 98,618.04 and 39,629.60 is: 54,684.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,468.48 : 98,618.04 = 39,629.60 : x
  2. Step 2: Convert to fraction form
    71,468.48/98,618.04 = 39,629.60/x
  3. Step 3: Cross multiply
    71,468.48x = 98,618.04 × 39,629.60
  4. Step 4: Simplify right side
    71,468.48x = 3,908,193,477.98
  5. Step 5: Solve for x
    x = 3,908,193,477.98/71,468.48
  6. Step 6: Final answer
    x = 54,684.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.