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Finding the Fourth Proportional to 71,557.60, 98,745.06 and 39,724.60

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Solution

The fourth proportional to 71,557.60, 98,745.06 and 39,724.60 is: 54,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,557.60 : 98,745.06 = 39,724.60 : x
  2. Step 2: Convert to fraction form
    71,557.60/98,745.06 = 39,724.60/x
  3. Step 3: Cross multiply
    71,557.60x = 98,745.06 × 39,724.60
  4. Step 4: Simplify right side
    71,557.60x = 3,922,608,010.48
  5. Step 5: Solve for x
    x = 3,922,608,010.48/71,557.60
  6. Step 6: Final answer
    x = 54,817.49

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1.5x scale

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.