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Finding the Fourth Proportional to 71,261.43, 98,340 and 39,430.56

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Solution

The fourth proportional to 71,261.43, 98,340 and 39,430.56 is: 54,413.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,261.43 : 98,340 = 39,430.56 : x
  2. Step 2: Convert to fraction form
    71,261.43/98,340 = 39,430.56/x
  3. Step 3: Cross multiply
    71,261.43x = 98,340 × 39,430.56
  4. Step 4: Simplify right side
    71,261.43x = 3,877,601,270.40
  5. Step 5: Solve for x
    x = 3,877,601,270.40/71,261.43
  6. Step 6: Final answer
    x = 54,413.74

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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.